Download APPENDIX D - 2 Special Status Plant Species

APPENDIX D - 2
Special Status Plant Species Assessment
RODDY RANCH
DEVELOPMENT SITE
SPECIAL STATUS
PLANT SPECIES
ASSESSMENT
Project No:
859 CSC
Zentner and Zentner
Oakland
Completed for:
Castle Companies
Date Issued:
August 2007
TABLE OF CONTENTS
I.
INTRODUCTION................................................................................................................. 1
A.
B.
I.
PURPOSE .............................................................................................................................. 1
METHODOLOGY ................................................................................................................... 1
1. Literature Review............................................................................................................ 1
2. Field Surveys................................................................................................................... 1
SETTING............................................................................................................................... 3
A.
B.
IV.
A.
B.
C.
D.
LOCATION AND SITE DESCRIPTION ...................................................................................... 3
EXISTING CONDITIONS ......................................................................................................... 3
1. Topography ..................................................................................................................... 3
2. Soils................................................................................................................................. 4
3. Hydrology ....................................................................................................................... 5
4. Habitats and Dominant Vegetation ................................................................................ 5
SPECIAL STATUS HABITATS AND SPECIES.......................................................... 6
INTRODUCTION .................................................................................................................... 6
METHODS ............................................................................................................................ 6
RESULTS .............................................................................................................................. 7
SUMMARY .......................................................................................................................... 47
APPENDICES
APPENDIX A – List of Plants Observed On-Site
APPENDIX B - Federal and State Species Lists
APPENDIX C - Special Status Species Assessment Table
APPENDIX D - Definitions for Special Status Species Designations
RODDY RANCH DEVELOPMENT SITE
SPECIAL STATUS PLANT SPECIES
ASSESSMENT
Zentner and Zentner
I.
INTRODUCTION
A.
Purpose
Zentner and Zentner completed this assessment for the Roddy Ranch development site (hereafter
referred to as the “project site”), which is part of a roughly 2100-acre site in the City of Antioch
in eastern Contra Costa County. This botanical report presents the results of assessments on the
likelihood of special status plant species to occur on-site, and then evaluates potential impacts
and mitigation measures. Special status species are those designated by Federal, State and/or
local governments as worthy of protection through listing or other mechanisms. Appendix D
contains a definition of special status species and the regulations that protect these organisms
B.
Methodology
Botanical resources in the project area and region were identified through literature reviews and
site surveys completed by Zentner and Zentner.
1.
Literature Review
The literature review provided information on general biological resources, rare or otherwise
special habitats, and on the distribution and habitat requirements of plant and animal species
(“taxa”) that have been reported from or are suspected to occur in the project vicinity. Zentner
and Zentner files, Contra Costa County data, and records of the California Natural Diversity Data
Base (CNDDB) of the California Department of Fish and Game (CDFG), US Fish and Wildlife
Service (USFW) species lists and California Native Plant Society (CNPS) were searched for
information regarding Antioch and its vicinity (Antioch North, Antioch South, Brentwood,
Clayton, Byron Hot Springs, Diablo, Honker Bay and Tassajara quads).
2.
Field Surveys
Field surveys conducted from May 2006 to October 2006 (approximately two surveys per
month) by Zentner and Zentner staff assessed the following:
•
•
Existing vegetation and habitat values of the project site.
Presence or potential presence special-status plant species populations.
The site survey protocols consisted of on-foot observations over the entire property, typically
beginning with the perimeter, then traversing the interior of the site.
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I.
SETTING
A.
Location and Site Description
Roddy Ranch consists of about 2100 acres in the southernmost portion of the City of Antioch,
eastern Contra Costa County (Figure 1). The Ranch is topographically divisible between Horse
Valley and its adjacent ridges in the northern third of the Ranch and Deer Valley and its
associated ridges in the southern two-thirds. The valleys and ridges run roughly northwestsoutheast with the south-facing, northern slopes of the valleys being very steep while the northfacing, southern slopes being much gentler.
The Ranch also includes a golf course of approximately 250 acres in the north-central part of the
Ranch, and farm and ranch buildings, mostly in Deer Valley. The ridgeline rises above 600 feet
above mean sea level (AMSL) and the valleys range from 250 - 300 feet AMSL. The ridgeline
south of Deer Valley rises to over 1,000 feet AMSL. Most of the Ranch outside the golf course
is either grassland in the valleys or woodlands on the north faces of the ridges. An orchard
occupies a portion of the Ranch in Deer Valley.
Generally, Briones Valley lies to the south of the Ranch (although a small area of slope draining
to this valley is located in the Ranch), East Bay Regional Park District lands associated with the
parks around Mt. Diablo are to the west, and ranch lands developing into homes and related
features abut the site to the north and east. Lands to the north are within the City of Antioch
while lands to the east are within the City of Brentwood.
To the north of Roddy Ranch is the recently developing Sand Creek Specific Plan Area and Lone
Tree Valley, separated by a 400 foot (AMSL) ridge. Also to the north and northeast is the
Ginochio Property. The Antioch General Plan intends that the Ginochio Property west of Deer
Valley Road be developed as a master planned enclave. The character of the Ginochio Property
should be defined principally as suburban density residential, preserving large, unbroken blocks
of open space.
A recent City of Antioch proposition for Roddy Ranch approved development of homes and
ancillary features on a maximum of 500 acres in the northern half of the Ranch, only in Horse
Valley. Consequently, the plants within Horse Valley are the focus of this report.
B.
Existing Conditions
1.
Topography
The topography of the Ranch is fairly typical of the eastern slopes and alluvial fans derived from
Mt. Diablo and its associated heights: relatively flat alluvial valleys bordered by steeply sloped
ridges. Elevations in the survey area range from 500 to 1120 ft at the ridgetop to 200 to 400 ft in
the valleys.
Horse Valley, which contains the development site and is the focus of this report, drops from
about 500 ft near the northwest corner of the site, to about 235 ft near the northeast corner of the
site. Deer Valley, in the southern part of the site, drops from 470 ft on the western edge of the
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site to about 225 ft on the eastern edge of the site. The ridgeline along the south side of Deer
Valley drops from about 1120 ft at the west end to 500 ft by the southeast end of the site.
The lowest spot on the Ranch is at an elevation of about 225 feet on the east edge of the Ranch
where Deer Valley Creek flows under Deer Valley Road. The highest spot is at an elevation of
about 1120 feet on the ridgeline at the southwest corner of the Ranch.
2.
Soils
Soils at Roddy Ranch are extremely diverse and reflect its underlying geology. Briones loamy
sand, a Typic Xeropsamment, is present over sandstone of both the Horse-Lone Tree and HorseDeer ridges, while Altamont clay, a Typic Chromoxerert, is present over mudstones and shales
on parts of all the site’s ridges. Shale and calcareous sandstone are so intermixed in hills at the
west end of Horse Valley that Altamont forms a complex with Fontana, a Calcic Haploxeroll
associated with such sandstones.
Another soil associated with mixed sandstone shale substrates is Los Gatos loam, a Typic
Argixeroll found on both Horse-Deer and Deer-Briones ridges. Where rock is closer to the
surface and soil is shallower on nearby parts of the same ridges Los Gatos is replaced by
Millsholm loam, a Lithic Xerochrept.
The primary alluvial soil on the floor of Horse Valley is San Ysidro loam, a Typic Palexeralf.
The San Ysidro series consists of moderately well-drained soils mainly on old alluvial fans and
valley floors. The soils are formed in alluvium from sedimentary rock. Permeability is very
slow and it is listed as hydric, that is, a wetland soil, by the USDA (1991, 1993). However,
lower and more poorly drained parts of this valley contain Solano loam, a Typic Natirixeralf with
greater salinity than San Ysidro. The Solano series consists of poorly drained soils formed in
alluvium from sedimentary rock. The soil is severely affected by sodium salts and has
hummocky microrelief, with slopes from 0-2 percent. Permeability and surface water runoff is
slow but it is not listed as hydric by the USDA (1991, 1993).
A similar situation is present in Deer Valley, in which the main alluvial soil is Rincon clay loam,
a Mollic Haploxeralf. The Rincon series consists of well-drained soils mainly on terraces. The
soils are formed in alluvial valley fill from sedimentary rock. Permeability and surface water
runoff is slow. It is not listed as hydric by the USDA (1991, 1993). This is replaced by
Pescadero clay loam, an Aquic Natrixeralf, in areas of poorer drainage and greater salinity. The
Pescadero series consists of poorly drained soils that formed in alluvium from sedimentary rocks.
Permeability is slow and surface water runs off very slowly. The soil is subject to some ponding
and is listed as hydric by the USDA (1991, 1993). Soils of the two valleys thus primarily differ
in being loams in Horse and clay loams in Deer. Rincon clay loam is also present under alluvial
benches occurring around the edges of both Horse and Deer valleys representing remnants of
alluvium present in the valleys when they were shallower prior to Mt Diablo’s uplift. The only
other mapped soil units on the site are rock outcrops on Deer-Briones Ridge and Capay Clay, a
Typic Chromoxerert on benches above Briones Valley at the extreme southern end of the Ranch.
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3.
Hydrology
Drainage on the Ranch is dominated by the two parallel ridges that bound Horse and Deer
Valleys. Both valleys drain to the east where they connect with Marsh Creek and then to Big
Break on the San Joaquin Delta. Most of the creeks in these valleys are gullied or channelized
within the relatively easily eroded valley bottom sediments described above. Deer Valley Creek
is the most notable waterway on-site, and flows as the name suggests through Deer Valley.
Horse Valley drains via several small but incised ephemeral drainages, and eventually connects
with Sand Creek off of the project site. A number of small, incised channels flow from the
ridgeline and are then lost in the alluvium of the valley floors. Stockponds also occur throughout
the valleys.
The average annual rainfall in this region is 13 inches, a relatively low annual precipitation rate
resulting from the rain shadow cast by Mt. Diablo. Several seeps were also present within the
study area in ravines or gullies feeding into the valley drainages. The creek channels (measured
at the ordinary high water line) vary in width from one to six feet and are between six inches and
four feet deep. These flows are intermittent, leaving the channels dry during much of the year.
4.
Habitats and Dominant Vegetation
The two primary vegetation types on the Ranch are woodland on the north-facing slopes of the
ridges and non-native grassland in the valleys (Figure 2). Woodland is primarily dominated by
blue oak (Quercus douglasii) with some gray pine (Pinus sabiniana), interior live oak (Q.
wislizenii), and chaparral vegetation. Prairie includes a widespread non-saline phase and a saline
phase on Solano and Pescadero soils. Woodland at the Ranch is favored on northeastern slopes
shielded from direct insolation but substrate is at least as significant a factor as microclimate
since, particularly on the Horse-Lone Tree Ridge, northeast slopes on mudstone are dominated
by grassland and southwest slopes on Domengine sandstone are covered by woodland. This
vegetation contrast is particularly striking at the head of Horse Valley where a fault abruptly
juxtaposes these two substrates and their resultant vegetation. The insolation effect on other
ridges is exacerbated because their southwest slopes tend to be mudstones and shales exposed
beneath sandstone layers that cap their summits and extend down their northeastern slopes.
The drainage channels, due to their incised character and lack of water retention, are also
dominated by non-native grassland and, at the east end of Deer Creek, alkali meadow. Scattered
stands of seasonal marsh also occur in some channel bottoms and basins within the grasslands.
Small patches of Diablan sage scrub and chamise chaparral occur mainly on the upper ridge tops.
A small stand of eucalyptus woodland and a grove of olive trees are also present.
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IV.
SPECIAL STATUS HABITATS AND SPECIES
A.
Introduction
Special status taxa (species) are those plant and animal species that, in the judgment of the
resource agencies, trustee agencies, and certain non-governmental organizations warrant special
consideration in CEQA documents. This can be a very broad definition as it includes the
following taxa:
•
Officially designated as “threatened”, “endangered” or “candidate” species federally
listed by the US Fish and Wildlife Service (USFWS) and protected under the Federal
Endangered Species Act (FESA).
ƒ
Officially designated as “rare”, “threatened”, or “endangered” or “candidate” species
state listed by the California Department of Fish and Game (CDFG) and protected under
the California Endangered Species Act (CESA). DFG also maintains a list of “Fully
Protected” species as well as “California Special Concern” species that are also generally
included as special status species under CEQA.
ƒ
Taxa considered rare, threatened, or endangered under the conditions of Section 15380 of
the California Environmental Quality Act (“CEQA”) Guidelines, such as the plant taxa
identified on lists 1A, 1B, and 2 in the California Native Plant Society (“CNPS”)
Inventory of Rare and Endangered Vascular Plants of California.
•
Other taxa considered sensitive such as plants included on lists 3 and 4 in the CNPS
Inventory. Taxa may also be designated as of special concern at the local level due to
limited data regarding distribution preventing threatened or endangered at the state or
federal level.
B.
Methods
This assessment included a review of the USFWS and CDFG lists of special status plants, the
California Natural Diversity Database (CNDDB), USFWS occurrence records for the Antioch
North, Antioch South, Brentwood, Byron Hot Springs, Clayton, Diablo, Honker Bay and
Tassajara quads, and the California Native Plant Society’s Inventory of Rare and Endangered
Vascular Plants of California (Skinner & Pavlik 1994) and other sources reflecting the taxa noted
above to define a list of special status plant species that could potentially occur on the project site
or in the region. Sycamore Associates also surveyed the site in 1998 and their botanical
assessment was reviewed for this report (Sycamore Associates LCC 1998).
Once this list was generated, Zentner and Zentner concluded a series of field reviews from May
2006 to October 2006 (approximately two surveys per month). Surveys were conducted by Dr.
Glen Holstein and Lesley Drummond of Zentner and Zentner.
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C.
Results
The complete listing of potential special status plant species in this region included 194 species
of plants. Appendix B contains the lists of species derived from the CNPS, CNDDB and federal
database searches as well as Zentner and Zentner’s knowledge of plants from the region.
Appendix C contains a summary table describing the potential species, their occurrence in the
region, the extent of on-site habitat, and the rationale for occurrence or non-occurrence on this
site. The definitions for the special status species designations (abbreviated after the common
name) are provided in Appendix D. Figure 3 shows the species that have been found within the
Roddy Ranch site and Figure 4 shows the species that were only found outside the Roddy Ranch
site. Species that have at least some potential to occur on-site are discussed individually below.
Zentner and Zentner considered the remaining special-status target species to have either a low
or no potential to occur within the development area due to a lack of suitable habitat, the lack of
detection during the surveys, or a combination of factors.
1.
Special Status Plants Found or Expected On-Site
Silverscale – Atriplex argentea var. mohavensis – CNPS A21
Silverscale is an annual herb found in alkali areas. Its range includes the Great Central Valley,
eastern San Francisco Bay Area, eastern South Coast and the Desert in California (Hickman
1993). Small immature plants of this taxon are common in alkaline prairie habitat in the
northeastern part of the development area along Empire Mine Road (Figure 3).
Big tarplant – Blepharizonia plumosa – CNPS 1B
Big tarplant (Blepharizonia plumosa ssp. plumosa) is a stout, strongly scented annual herb in the
sunflower family (Asteraceae), growing up to six feet tall. Leaves are gray-green, densely pilose
and crowded at the base, almost forming a rosette. Leaves are 2-5 inches long and less than ½
inch wide with serrate to entire margins. Flower heads are large, an inch or more across, and
made up of showy white ray flowers with reddish-purple veins on back. Flowers appear from
July through October (Hickman 1993). Big tarplant occurs in valley and foothill grasslands on
dry sites. It is extant in Alameda and Contra Costa counties but is believed extirpated in San
Joaquin, Stanislaus and Solano counties (CNPS 2003).
During September Sycamore’s 1998 botanical surveys, 12 distinct populations of big tarplant
were identified on the entire Roddy Ranch property, ranging in size from as many as 3,637
individuals to as few as seven plants (Figure 3). The majority of the populations are
concentrated in the upper portions of Horse Valley. A single population is located on a knoll at
the lower end of the valley, near the junction of Empire Mine Road and Deer Valley Road.
Other populations are found adjacent to Chadbourne Road just east of the Roddy residence, and a
1
Appendix D provides the key and the definitions for the special status species designations.
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small stand occurs in the upper part of Deer Valley Road. Zentner and Zentner’s botanical
surveys confirmed seven of these populations that occur within the development area (Figure 5).
Sycamore estimated that over 10,000 individuals of big tarplant occur on the entire Roddy Ranch
property in 1998. Zentner and Zentner estimate approximately 2,100 individuals within the
development area. This discrepancy could be due to variation in weather between years,
differences in estimating techniques, depletion as a result of increased disking or any
combination of these factors.
Dominant species co-occurring with big tarplant include the non-native species Italian ryegrass
(Lolium multiflorum), soft chess (Bromus hordeaceus), yellow star thistle (Centaurea
solstitialis), ripgut brome (Bromus diandrus) and wild oats (Avena fatua) (CDFG 2007).
The presence of big tarplant at Roddy Ranch is considered to be of botanical interest. In the East
Bay, its distribution is extremely limited. It has been recorded historically from Briones Valley,
Contra Loma Regional Park near Antioch, and the vicinity of Marsh Creek. Big tarplant was
also recently discovered near California State University Hayward’s Contra Costa campus on
Ygnacio Valley Road in Clayton (Sycamore 1997). An unconfirmed sighting was made near
Antioch in the 1980s by the well-known botanist Walter Knight, who was unable to re-locate the
population during subsequent visits. Zentner and Zentner staff noticed even larger big tarplant
populations than those found on Roddy Ranch on the adjacent property, east of the Deer Valley
Road.
Small-flowered morning-glory – Convolvulus simulans – CNPS *A1, CNPS
List 4
The small-flowered morning-glory is an annual herb found in openings within chaparral habitats,
coastal scrub and valley and foothill grasslands, often with clay or serpentine seeps. The species
blooms from March to July. Its range includes the San Joaquin Valley, Central Western
California, Southwestern California and the southern Channel Islands within California
(Hickman 1993). Prairie habitat potentially suitable for this species is widespread in the site’s
development area and two small populations were found in April on disked ground near the large
stock pond closest to the golf course entrance; one was west of the pond, the other south of it
(between the pond and the road) (Figure 3).
Hansen’s larkspur – Delphinium hansenii – CNPS A1
Hansen’s larkspur is a perennial herb found in oak woodland and chaparral habitats. It blooms
from April to June. Its range includes the Inner North Coast Ranges, the Cascade Range
Foothills, the Sierra Nevada Foothills, central and southern High Sierra Nevada, the Tehachapi
Mountain Area, the Great Central Valley and the western edge of the Mojave Desert (Hickman
1993). This species is common in the development area in woodland habitat on the north slope
of the ridge south of Horse Valley (Figure 4). This occurrence is notable because the species is
not included in an East Bay counties checklist (Ertter 1997) nor listed for the southern Coast
Range in the Jepson Manual (Hickman 1993). D. hansenii may have been overlooked in Contra
Costa County because of its resemblance to D. variegatum, from which it is separated by having
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prickly rather than smooth seeds. Delphiniums collected at Roddy Ranch have the distinctive
prickly seeds of D. hansenii.
Cupped downingia – Downingia insignis – CNPS A2
Cupped downingia is an annual herb found in vernal pools, roadside ditches and lake margins.
Its range within California includes northern High Sierra Nevada, the central portion of the Great
Central Valley (Glenn to Stanislaus Counties) and the Modoc Plateau (Hickman 1993). This
species is common in beds of seasonal ponds located at the eastern end of the site’s development
area along Deer Valley Road (Figure 3). These ponds are not natural vernal pools but appear to
result from water seasonally impounded by the road’s embankment.
Sharp-toothed pepper-grass – Lepidium dictyotum var. acutidens – CNPS A2
Sharp-toothed pepper-grass is an annual herb found in alkali areas. Its range within California
includes the Cascade Range, the Great Central Valley, Southwestern California and the Modoc
Plateau (Hickman 1993). This taxon is common in alkaline prairie habitat along Empire Mine
Road in the northeastern part of the site’s development area (Figure 3).
Pillwort – Pilularia Americana – CNPS A2
Pillwort is an aquatic herb found in vernal pools and wetland habitats. Its range within
California includes the Inner North Coast Ranges, the Cascade Range, northern and central
Sierra Nevada Foothills, northern High Sierra Nevada, the Great Central Valley, the San
Francisco Bay Area, the South Coast Ranges, the South Coast, the Western Transverse Ranges
and the Peninsular Ranges (Hickman 1993). This species is common in beds of seasonal ponds
along Deer Valley Road at the eastern end of the site’s development area (Figure 3).
2.
Special Status Plants Not Expected On-Site
Iodine bush – Allenrolfea occidentalis – CNPS A2
Iodine bush is a perennial shrub restricted to alkali areas where the soils are poorly drained and
have high salinity at elevations of 1,300 m or below. It can be found from San Joaquin Valley,
east San Francisco Bay Area, Inner South Coast Ranges, north Western Transverse Ranges, east
Peninsular Ranges, southeast of Sierra Nevada to the desert in California (Hickman 1993). It
flowers from June to August. A limited amount of alkaline habitat potentially suitable for this
species is present in northeastern part of the site’s development area along Empire Mine Road,
but numerous intensive surveys of this area determined iodine bush is not currently present there.
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Peninsular onion – Allium peninsulare var. peninsulare – CNPS A1x
The peninsular onion is a perennial bulbiferous herb found in dry open slopes from the Sierra
Nevada Foothills, Tehachapi Mountain Area, Sacramento Valley, Central Coast, San Francisco
Bay Area, South Coast Ranges, to southwestern California (Hickman 1993). Prairie habitat
potentially suitable for this taxon is widespread in the site’s development area but most has been
disked and is dominated by weedy non-native species. Surveys in its March-June blooming
period did not find this taxon at the site.
Straggling gilia – Allophyllum gilioides ssp. violaceum –CNPS A1
The straggling gilia is an annual herb found in grasslands and sandy areas. Its range in
California includes the North Coast Ranges, Sierra Nevada, San Francisco Bay Area, South
Coast Ranges, Transverse Ranges, Peninsular Ranges, the northeast of Sierra Nevada, and the
Desert Mountains (Hickman 1993). Sandy prairie habitat potentially suitable for this taxon is
present in the northwestern part of the site’s development area but surveys in its May-July
blooming period did not find it there; therefore it is not expected.
Powell’s amaranth – Amaranthus powellii –CNPS A1
Powell’s amaranth is an annual herb that grows in waste places. Its range within California
includes the Sierra Nevada Foothills, Great Central Valley, Central Western California,
Southwestern California and the White and Inyo Mountains (Hickman 1993). Although ruderal
prairie potentially suitable for this species is widespread in the site’s development area, Powell’s
amaranth is not expected because surveys conducted in its July-October blooming period did not
find it.
Douglas’ fiddleneck – Amsinckia douglasiana – CNPS A1x
Douglas’ fiddleneck is an annual herb found on loose, shaley slopes. It is found in the South
Coast Ranges and the Western Transverse Ranges in California (Hickman 1993). Prairie habitat
potentially suitable for this species is present in the site’s development area, but Douglas’
fiddleneck is not expected as a survey in its March-May blooming period did not find it at the
site.
Large-flowered fiddleneck – Amsinckia grandiflora – FE, CE, CNPS 1B
Large-flowered fiddleneck, the rarest of the ten California species of Amsinckia, is an erect,
coarsely hairy annual herb, growing to 50 cm. tall and having bright orange flowers (14-20 mm.
long) from April to May. The large, orange-red flowers are borne on stalks curved like the neck
of a fiddle. This species prefers deep loamy soils of sedimentary origin on mesic, north-facing
slopes and is found in cismontane woodland and valley and foothill grasslands (CDFG 2000).
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The historic distribution of this species included the dry inland hills of Alameda, Contra Costa
and San Joaquin counties. At present, only three natural populations are known. These all occur
in the Altamont Hills of the Diablo Range. Two small populations are found on the U.S.
Department of Energy's Lawrence Livermore National Laboratory (LLNL) land at what is
known as Site 300 and are referred to as the Drop Tower and Draney Canyon populations. The
third, largest population was recently discovered on private rangeland in Carnegie Canyon near
the southern border of Site 300. In 1989 and 1990, several experimental populations were
planted in historic habitat. Only one successfully established at Black Diamond Mines Regional
Preserve in eastern Contra Costa County (CDFG 2000).
Populations of large-flowered fiddleneck suffer from low reproductive output, usually less than
20 nutlets per plant, compared to 200-300 by other species of Amsinckia. Large-flowered
fiddleneck also has specific habitat requirements (deep loamy soils of sedimentary origin; mesic,
north-facing slopes). Much of the habitat of the species is now grazing land. The primary
current threat to the species is believed to be competition from non-native, annual grasses. Other
threats include stochastic extinction due to small numbers of populations and fluctuations in
numbers due to predation by rodents (USFWS 1997).
All of the populations, both native and experimental, have experienced dramatic declines in the
last several years which is likely due to unusually heavy rainfall years and an increase in
nonnative grasses, therefore increasing food sources to rodents and increasing rodent
populations. LLNL manages the populations on its land, including controlling non-native
species and developing techniques for native grass restoration (CDFG 2000).
The closest known occurrence record of this species is 0.48 miles from the project site, on the
northeast slope of Mount Diablo, however this was recorded in 1887 and has since been
extirpated from that location (Figure 4). There is potential habitat on-site for this species on site,
although it is not expected because it was not observed during focused botanical surveys during
its flowering period from April to May.
Bent-flowered fiddleneck – Amsinckia lunaris – CNPS 1B
The bent-flowered fiddleneck is an annual herb with harsh pubescence that reaches about 6 dm.
It has two flower morphs within and between populations (Hickman 1993). It is found in coastal
bluff scrub habitats, cismontane woodlands and valley and foothill grasslands; more specifically,
it is found on shaded or sheltered slopes in openings or edges of oak woodland, in herb-rich
understory of coast live oak (Quercus agrifolia) and big-leaf maple (Acer macrophyllum), on
edges of poison oak (Toxicodendron diversilobum) thickets and on steep grassy banks in
woodland openings (Ray, et al. 1957). It is endemic to California and has a wide distribution in
the San Francisco Bay region and the Inner North Coast Ranges. The bent-flowered fiddleneck
flowers from March to June (Hickman 1993). Although there is potential for the species to occur
on site, it is not expected to occur because there are no known records of the species within five
miles of the project site and it was not observed during focused botanical surveys during its
flowering period.
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Tessellate fiddleneck - Amsinckia tessellata var. gloriosa - CNPS A1x
Tessellate fiddleneck is an annual herb found on sandy or shaly soils. Its range within California
includes the Inner North Coast Ranges, Sacramento Valley (Colusa Co.), San Francisco Bay
Area, South Coast Ranges, Western Transverse Ranges and the Mojave Desert (Hickman 1993).
Prairie habitat potentially suitable for this species is present in the site’s development area, but a
plant survey conducted there in its March blooming period did not find it, so it is not expected.
Eastwood manzanita - Arctostaphylos glandulosa ssp. glandulosa - CNPS A2
The eastwood manzanita is a perennial shrub found in chaparral habitats. Its range includes the
Klamath Ranges, North Coast Ranges and the San Francisco Bay Area within California
(Hickman 1993). Limited areas of chaparral potentially suitable for this taxon are present in the
site’s development area on the north slope of the ridge south of Horse Valley. An intensive
survey of these chaparral areas determined this taxon is not present in the development area.
Prickly poppy - Argemone munita - CNPS A1
Prickly poppy is an annual or perennial herb found in open areas, especially burned areas. Its
range includes northwestern California (except North Coast), Central Western California,
southwestern California, the Great Basin Floristic Province and the desert within California
(Hickman 1993). This species potentially occurs in open areas like chaparral burns and sandy
prairie. Although a recent burn occurred on the site in the summer of 2006 and sandy prairie is
present in the northwestern part of its development area, prickly poppy is not expected to occur
on site because surveys conducted there during its June-September blooming period did not find
it.
Two-seeded milkvetch - Astragalus didymocarpus var. didymocarpus - CNPS
A1
The two-seeded milkvetch is an annual herb found in grassland habitats in the central and
southern Sierra Nevada Foothills, Tehachapi Mountain Area, Great Central Valley, Central
Western California, Southwestern California (except Channel Islands) and the Mojave Desert
within California (Hickman 1993). Prairie habitat potentially suitable for this taxon is
widespread in the site’s development area, but two-seeded milkvetch is not expected as a survey
in its March-May blooming period did not find it at the site.
Diablo locoweed - Astragalus oxyphysus - CNPS A1
Diablo locoweed is a perennial herb found in grassland and scrub habitats. Its range includes the
southern Sierra Nevada Foothills, the San Joaquin Valley and the Inner South Coast Ranges of
California (Hickman 1993). Although prairie habitat potentially suitable for this species is
widespread in the site’s development area, Diablo locoweed is not expected because surveys in
its February-June blooming period did not find it.
12
Alkali milk-vetch - Astragalus tener var. tener - CNPS 1B
Alkali milk-vetch is an annual herb inhabiting playas, edges of salt marshes, alkali meadows,
clay soils supporting valley and foothill grasslands, and alkaline, vernal pools (CNDDB 2001).
The vernal pool types in which it grows are Northern Basalt Flow, Northern Claypan, Northern
Hardpan, and Northern Volcanic Ashflow (Sawyer and Keeler-Wolf 1995). It occurs in open,
alkaline and vernally moist meadows from sea level to 200 feet in elevation. Alkali milk-vetch
is a delicate, sparsely hairy to smooth herb, growing one to twelve inches high. It produces two
to twelve pink-purple flowers per inflorescence. Fruits are elongated legumes under an inch
long. This species can be distinguished from all other species of Astragalus that occur in the
same areas by its deflexed fruit stalks and smooth seeds (Liston 1992). This variety flowers
from March through June (Skinner and Pavlik 1994).
The alkali milk-vetch is believed extant in Alameda, Merced, Napa, Solano, and Yolo counties.
It is believed extirpated from Contra Costa, Monterey, San Benito, Sonoma, and Stanislaus
counties (Keeler-Wolf et al. 1998).
Threats to the species include habitat destruction, especially agricultural conversions (Skinner
and Pavlik 1994). However, anecdotal evidence suggests that A. tener var. tener may benefit
from some types of temporary surface disturbance (C. Witham in litt. 1998). Competitors that
threaten A. tener var. tener include Lepidium latifolium and Salsola spp. (Russian thistle) in Yolo
County, and Melilotus indica (sweet clover) and Lolium multiflorum in Alameda County
(CNDDB 2001). Extirpation from random processes is also a threat to virtually all of the
populations due to their small numbers of plants, which make them vulnerable to chance events.
Loss of pollinators due to destruction or degradation of their habitat also is a threat to A. tener
var. tener because it would not be able to set seed if pollinators were absent. Alkali milk-vetch
was last collected in the Bay Area in 1959. It is protected at the Jepson Prairie Preserve. Alkali
milk-vetch is known from San Francisco from historical records. It was purportedly identified in
1868 by Kellogg and Harford, occurring in low, sub-saline fields in the Mission Dolores area.
There are no known records of this species within five miles of the project site. Additionally, the
species was not seen during focused plant surveys during its flowering period, so it is not
expected to occur on site.
Heartscale – Atriplex cordulata – CNPS 1B
Heartscale (Atriplex cordulata) is a low annual plant species in the saltbush family
(Chenopodiaceae). It produces few, erect and rigid branches reaching 20 inches in height.
Leaves are gray and scaly on both surfaces, about one half inch long and have cordate to rounded
bases. It is distinguished by ovate to rounded fruit bracts that are deeply toothed and fused to the
middle. Heartscale flowers May through October. The species occurs in chenopod scrub and
valley grassland on somewhat alkaline or saline hard-packed soils throughout the San Joaquin
Valley and in the southern Sacramento Valley (Hickman 1993).
13
One population of heartscale, totaling 20 individuals, was located outside the development area
at Roddy Ranch during Sycamore Associates 1998 surveys (Figure 4). It occurs in a sparsely
vegetated alkali scald area immediately adjacent to the intersection of Deer Valley and
Chadbourne Roads. Heartscale was not seen during Zentner and Zentner 2006 surveys within
the development site and it is not expected to occur there.
Crownscale – Atriplex coronata var. coronata – CNPS *A2
Crownscale is an annual herb found in alkali areas, grasslands and vernal pools. Its range
includes southern Sacramento Valley, the San Joaquin Valley and the eastern Inner South Coast
Ranges (Hickman 1993). Alkaline habitat potentially suitable for this taxon is present in the
northeastern part of the development area along Empire Mine Road, but crownscale is not
expected because surveys there during its March-October blooming period did not find it.
Brittlescale – Atriplex depressa – CNPS 1B
Brittlescale is a diminutive annual herb that occurs on alkali soils of the Pescadero and Solano
series. Brittlescale typically occurs in barren areas within alkali grassland, alkali meadow, and
alkali scrub. It is occasionally found on the margins of alkali vernal pools. It generally grows
prostrate, rarely exceeds 20 centimeters in height and blooms from May through October
(Hickman 1993).
Brittlescale occurs along the western side of the Great Valley from Glenn County to Merced
County and in the small valleys of the inner Coast Ranges. It occurs in the broad flood basins of
the valley floor and on alluvial fans associated with the major streams draining from the inner
Coast Range foothills. It is generally found at low elevations but has been collected up to 1,055
feet above sea level.
Brittlescale is known from only a limited number of occurrences and is endangered in a portion
of its range. Population trends are unknown, but are likely stable or declining (CNDDB 2001).
The principal threat to brittlescale has been the historic conversion of much of the alkali
grassland to agriculture. Present threats include flooding of alkali grassland to create waterfowl
habitat, grazing, trampling, and urban development (CNDDB 2001, CNPS 2001).
Brittlescale has been recorded 0.6 miles from the project site (Figure 4), but was not observed in
the development area during focused surveys during its flowering period, so is not expected to
occur within the development area.
San Joaquin saltbush – Atriplex joaquiniana – CNPS 1B
San Joaquin spearscale is an annual herbaceous plant that is found on alkaline soil below
approximately 1,000 feet in elevation. It is gray-green in color, with sparsely scaled stems and
leaves and has a blooming period from April through September. Its range is generally restricted
to the south Sacramento Valley, San Joaquin Valley and the eastern slope of the inner South
Coast Ranges (Hickman 1993). This species is found in meadows and seeps and valley and
14
foothill grasslands throughout California.
alkalinity.
It occurs on clay soils, often in areas of high
The principal threat to San Joaquin spearscale has been the historic conversion of much of the
alkali grassland to agriculture. Present threats include habitat conversion to urban use,
overgrazing, and impacts associated with road and utility line construction and maintenance
(CNDDB 2001).
The closest CNDDB occurrence record of this species is 0.62 miles from the project site in an
annual grassland adjacent to alkali seep/marsh habitat (Figure 4). It has potential to occur in the
sedge bed habitat on-site at the bottom of the hillside where there is seepage from the
groundwater, but this species was not observed during focused surveys and is therefore not
expected to occur on-site.
Bractscale – Atriplex serenana var. serenana – CNPS A1
Bractscale is an annual herb found in alkali areas and coastal bluff habitats. Its range includes
southern Sierra Nevada, San Joaquin Valley, Outer South Coast Ranges, Southwestern
California, East of Sierra Nevada (naturalized), western Mojave Desert and the Sonoran Desert
(Hickman 1993). Alkaline habitat potentially suitable for this taxon is present in the northeastern
part of the development area along Empire Mine Road, but surveys there during its May-October
blooming period did not find it.
Deltoid balsamroot – Balsamorhiza deltoidea– CNPS A2
Deltoid balsamroot is a perennial herb found in forest, grassland, scrub, sand or sandstone and
woodland habitats. Its range includes northwestern California, the High Cascade Range, Sierra
Nevada, Central Western California and Western Transverse Ranges in California (Hickman
1993). Although prairie and open woodland habitat potentially suitable for this species is
widespread in the site’s development area, deltoid balsamroot is not expected because surveys
there during its April-June blooming period did not find it.
Big-scale balsamroot – Balsamorhiza macrolepis – CNPS 1B
The big-scale balsamroot is a perennial from coarse, woody rootstock with multiple basal leaves,
4 to 18 inches (10 to 45 cm) long and 2 to 4 inches (5 to 10 cm) wide. It has yellow sunflowerlike heads, 2 to 4 inches (5 to 10 cm) wide, on wand-like stems, 4 to 16 inches (10 to 40 cm) tall
(Hickman 1993).
This species is found in the Northern Inner Coast Ranges, Sacramento Valley and Sierra Nevada
Foothills in meadows to rock outcrops and grasslands to confer stands, as well as on serpentine
soils from approximately 100 to 3000 feet in elevation. It flowers from March to June (CNPS
2001).
15
There are no known occurrences of this species within five miles of the project site. Although
there is potential habitat on site, the species was not observed during focused surveys and is
therefore not expected to occur on-site.
Big tarweed – Blepharizonia laxa – CNPS A2
Big tarweed (Blepharizonia laxa) is an annual herb found in chaparral, grassland, scrub and
woodland habitats. Its range includes western San Joaquin Valley (Alameda Co.), eastern San
Francisco Bay Area and the South Coast Ranges (Hickman 1993). Prairie habitat potentially
suitable for this species is widespread in the site’s development area, but it is not expected
because surveys in its July-October blooming period did not find it.
Brewer’s calandrinia – Calandrinia breweri – CNPS *A2
Brewer’s calandrinia is and annual herb that occurs primarily in recent burns and chaparral and
scrub habitats. It can be found from the North Coast Ranges, the central Sierra Nevada Foothills,
the San Francisco Bay Area, the Outer South Coast Ranges and the South Coast to the Western
Transverse Ranges. Although a recent burn occurred on site in the summer of 2006 in the
northwest portion of the development site, close to empire mine road, and north of the golf
course, surveys during its March-June blooming period in the development area did not find it.
Mt. Diablo fairy-lantern – Calochortus pulchellus – CNPS 1B
Mt. Diablo fairy-lantern is a deciduous bulb that grows to 1.0 meters (3.3 feet) high by 0.5
meters (1.65 feet) wide and prefers sandy loam soil with a pH ranging from acid to alkaline and
partial to full sun with little to moderate amounts of moisture. This plant has yellow, scented,
globe-shaped, hermaphrodite flowers and is pollinated by insects. The sepals are usually
greenish and "cup" the petals. It is found on woody and brushy slopes in chaparral, pine and oak
forest above 200 meters and valley and foothill grasslands (Hickman 1993).
Calochortus pulchellus is rare in the wild and is found in Contra Costa and possibly Solano
County. The Mt. Diablo fairy-lantern is endemic to Mt. Diablo and surrounding foothills. In late
April and early May it can be found in the foothill woodlands of Briones, Mt. Diablo, Diablo
Foothills and Morgan Territory Parks. Grazing poses a major threat to this rare species (CNPS
2003).
The closest CNDDB occurrence record of this species is 3.03 miles from the project site (Figure
3) on a rocky north-facing slope, shaded by coast live oak (Quercus agrifolia) and alongside
poison oak (Toxicodendron diversilobum). Although there is suitable habitat on site for this
species, it was not seen in the development area during focused surveys during its flowering
period, so is not expected to occur on site.
16
Sticky calycadenia - Calycadenia multiglandulosa – CNPS A1
Sticky calycadenia is an annual herb found in generally dry, open valleys, hillsides and rocky
ridges. Its range includes the North Coast Ranges, Sierra Nevada, Great Central Valley, San
Francisco Bay Area and the Inner South Coast Ranges in California (Hickman 1993). Rocky
prairie habitat suitable for this species is only poorly developed in the site’s development area
and sticky calycadenia is not expected because surveys there during its May-October blooming
period did not find this plant.
Mohave suncup - Camissonia campestris ssp. campestris – CNPS A1x
Mohave suncup is an annual herb found in grassland, scrub, sand or sandstone habitats. Its range
includes the Sierra Nevada Foothills, Great Central Valley, Central Western California, eastern
Southwestern California and the Mojave Desert in California (Hickman 1993). Although sandy
prairie habitat potentially suitable for this taxon is present in the northwestern part of the site’s
development area, Mohave suncup is not expected to occur on the development site because a
survey during its March-May blooming period did not find it.
Hill sun cup - Camissonia graciliflora – CNPS A2
Hill sun cup is an annual herb found on dry open slopes, grassland, scrub and woodland habitats.
Its range in California includes Northwestern California, Cascade Range, Sierra Nevada
Foothills, Great Central Valley, Central Western California, Western Transverse Ranges
(Hickman 1993). Although prairie habitat potentially suitable for this species is widespread in
the site’s development area, hill sun cup is not expected because a survey during its March-May
blooming period did not find it.
Small primrose - Camissonia intermedia – CNPS A2
The small primrose is an annual herb found primarily in recent burns and scrub habitat. Its range
includes Northwestern California, Central Western California and Southwestern California
(Hickman 1993). Although a recent burn occurred on site in the summer of 2006, small primrose
is not expected because surveys during its April-July blooming period did not find it.
Contorted primrose - Camissonia strigulosa – CNPS A1
Contorted primrose is an annual herb found in grassland, sand or sandstone habitats. Its range
within California includes the southern edge of the High Sierra Nevada, the Tehachapi Mountain
Area, Central Western California, Southwestern California, northern Channel Islands (Santa
Rosa Island) and the western Mojave Desert (Hickman 1993). Sandy prairie habitat potentially
suitable for this species is present in the northwestern part of the site’s development area, but
surveys in its April-June blooming period did not find it.
17
Congdon’s tarplant - Centromadia parryi ssp. congdonii – FSC, CNPS 1B
Congdon’s tarplant is an annual herb that blooms from May to October. This taxon’s preferred
habitat of semi-alkaline heavy clay soils on level valley floors has been almost completely
replaced by urbanization in coastal central California, and competition from invasive exotic
weeds may also have contributed to its current near extinction (Hickman 1993).
There are no known records of Congdon’s tarplant within five miles of the project site.
Although suitable habitat exists, the species was not found during surveys and therefore it is not
expected to occur on-site.
Yellow pincushion – Chaenactis glabriuscula var. megacephala – CNPS A1
Yellow pincushion is an annual herb found in dry open slopes in sand or sandstone. Its range in
California includes southern Sierra Nevada Foothills, the Tehachapi Mountain Area, the San
Joaquin Valley, Central Western California, northern Southwestern California (Hickman 1993).
Sandy prairie habitat potentially suitable for this species is present in the northwestern part of the
site’s development area, but yellow pincushion is not expected as surveys during its FebruaryJuly blooming period did not find it.
Valley spurge – Chamaesyce ocellata ssp. ocellata – CNPS A2
Valley spurge is an annual herb found in sandstone habitats. Its range within California includes
the California Floristic Province, except Peninsular Ranges (Hickman 1993). Although sandy
prairie habitat potentially suitable for this taxon is present in the northwestern part of the site’s
development area, valley spurge is not expected as surveys during its May-October blooming
period did not find it.
Pink spineflower – Chorizanthe membranacea – CNPS A2
Pink spineflower is an annual herb found in various habitats including grassland, chaparral and
foothill woodlands. Its range includes Northwestern California, the Cascade Range, the Sierra
Nevada Foothills, the Tehachapi Mountain Area, the Great Central Valley, Central Western
California and the northern Western Transverse Ranges (Hickman 1993). Prairie habitat
potentially suitable for this species is widespread in the site’s development area, but surveys
during its April-July blooming period did not find it.
Modest clarkia – Clarkia modesta – CNPS A2
Modest clarkia is an annual herb found in woodlands. Its range includes the Inner North Coast
Ranges, central and southern Sierra Nevada Foothills, San Francisco Bay Area and the South
Coast Ranges in California (Hickman 1993). Woodland habitat potentially suitable for this
species is present in the development area on the north slopes of the ridge south of Horse Valley,
but a survey during its April-May blooming period did not find it.
18
White Chinese houses – Collinsia bartsiifolia var. bartsiifolia – CNPS A1
White Chinese houses is an annual herb found on sand or sandstone. Its range includes
Northwestern California, the Cascade Range Foothills, the Sierra Nevada Foothills and Central
Western California (Hickman 1993). Although sandy prairie habitat potentially suitable for this
taxon is present in the northwestern part of the site’s development area, white Chinese houses is
not expected because surveys during its March-May blooming period did not find it.
Coulter’s conyza – Conyza coulteri – CNPS A1
Coulter’s conyza is an annual herb found in disturbed places. Its range includes southern Sierra
Nevada Foothills, the San Joaquin Valley, Central Western California, Southwestern California,
the White and Inyo Mountains and Desert within California (Hickman 1993). Although ruderal
prairie habitat potentially suitable for this species is widespread in the site’s development area,
Coulter’s conyza is not expected because surveys during its May-October blooming period did
not find it.
Hispid bird's beak – Cordylanthus mollis ssp. hispidus – CNPS 1B
Hispid bird’s-beak is an annual herb endemic to California and found in meadows and seeps,
playas, and alkaline valley and foothill grasslands. This species blooms from June to September.
It is known from only a total of four sites in California, in the Central Valley and North Central
Coast. Hispid bird’s beak is threatened by grazing pressure, agricultural conversion and
development (CNPS 2007).
There are no known records of occurrence of this species within five miles of the project site.
Although there is suitable habitat on site for this species, it was not seen in the development area
during focused surveys during its flowering period, so is not expected to occur on site.
Palmate-bracted bird's beak – Cordylanthus palmatus – FE, SE, CNPS 1B
Palmate-bracted bird's-beak is an annual herb in the snapdragon family (Scrophulariaceae). The
plants are 4-12 inches tall and highly branched. The stems and leaves are grayish green and
sometimes covered with salt crystals excreted by glandular hairs. Small pale whitish flowers, ½inch to 1 inch long, are arranged in dense clusters (spikes) and densely surrounded by herbaceous
leaf-like bracts. Like other Cordylanthus species, the petals are divided into two lips. The upper
one is shaped like a bird's-beak, leading to the common name of the genus. Seedlings grow in
late March or April (Hickman 1993). Flowers bloom from May through October. Like other
members of Cordylanthus and related genera, palmate-bracted bird's-beak is partially parasitic on
the roots of other plants. Its host plant may be salt grass (Distichlis spicata) (Brown et al. 1986).
Palmate bracted bird's-beak grows on seasonally-flooded, saline-alkali soils in lowland plains
and basins at elevations of less than 500 feet. Within these areas, it grows primarily along the
19
edges of channels and drainages, with a few individuals scattered in seasonally-wet depressions,
alkali scalds (barren areas with a surface crust of salts) and grassy areas. Palmate-bracted bird'sbeak grows in valley sink scrub and alkali meadow natural communities in association with other
species tolerant of high salt concentrations, such as iodine bush (Allenrolfea occidentalis), alkali
heath (Frankenia salina), glasswort (Salicornia subterminalis), seepweed (Suaeda moquinii) and
salt grass (USFWS 1998).
Historically, the species is known from scattered locations in Fresno and Madera counties in the
San Joaquin Valley, San Joaquin, Yolo, and Colusa counties in the Sacramento Valley and the
Livermore Valley area of Alameda County. It is currently known to occur in 21 locations in the
Sacramento, Livermore and San Joaquin Valleys. These include Sacramento National Wildlife
Refuge (NWR) in Glenn County, Delevan NWR in Colusa County, Colusa NWR in Colusa
County, and the combined Alkali Sink Ecological Reserve and Mendota Wildlife Management
Area (USFWS 1998).
There are no known records of occurrence of this species within five miles of the project site.
Although there is suitable habitat on site for this species, it was not seen in the development area
during focused surveys during its flowering period, so is not expected to occur on site.
Hoover's cryptantha – Cryptantha hooveri – CNPS 1B
Hoover’s cryptantha is an annual herb found in inland dunes and valley and foothill grasslands,
often in sandy soils. It was last seen in 1939 and is presumed extinct in California. Its blooming
period is from April to May (CNPS 2007). There are no known records of occurrence of this
species within five miles of the project site. Although there is suitable habitat on site for this
species, Hoover’s cryptantha was not seen in the development area during focused surveys
during its flowering period, so is not expected to occur on site.
Tejon cryptantha – Cryptantha microstachys – CNPS A2
Tejon cryptantha is an annual herb found in chaparral and woodland habitats. Its range includes
the Inner North Coast Ranges, southern Sierra Nevada, the San Francisco Bay Area, the South
Coast Ranges and Southwestern California, except the Channel Islands(Hickman 1993).
Woodland and chaparral habitat potentially suitable for this species is present in the development
area on the north slopes of the ridge south of Horse Valley, but Tejon cryptantha is not expected
on site because a survey during its April-June blooming period did not find it.
Red-rooted cyperus – Cyperus erythrorhizos – CNPS A2
Red-rooted cyperus is an annual herb found in riparian habitats. Its range includes all of
California (Hickman 1993). Although wetland habitat potentially suitable for this species is
present at the edges of seasonal and permanent ponds in the site’s development area, surveys
during its July-October blooming period did not find the red-rooted cyperus on site.
20
Parry’s larkspur – Delphinium parryi ssp. parryi – CNPS A1
Parry’s larkspur is a perennial herb found in chaparral and oak woodland habitats. Its range
includes Central Western California and Southwestern California (Hickman 1993). Although
woodland and chaparral habitat potentially suitable for this taxon is present in the development
area on the north slopes of the ridge south of Horse Valley, Parry’s larkspur is not expected
because a survey during its April-May blooming period did not find it.
Recurved larkspur – Delphinium recurvatum – CNPS 1B
Recurved larkspur is a perennial herb that can be found in alkaline soils of chenopod scrub,
valley and foothill grassland and cismontane woodland in the San Francisco bay area, central
coast and central valley. It has a blooming period of March through May (Hickman 1993). This
species was probably much more common in the past but most of its habitat has been converted
into irrigated croplands. There are no known records of occurrence of this species within five
miles of the project site. Although there is suitable habitat on site for this species, it was not seen
in the development area during focused surveys during its flowering period, so is not expected to
occur on site.
Tansy mustard – Descurainia pinnata ssp. menziesii – CNPS A1
Tansy mustard is an annual herb found on rocky flats, disturbed areas, washes and chaparral
habitats. Its range includes the southern High Sierra Nevada, the Great Central Valley, the
Central Coast, the San Francisco Bay Area, Southwestern California and the Desert Mountains
within California (Hickman 1993). Although ruderal prairie habitat potentially suitable for this
taxon is widespread in the site’s development area, tansy mustard is not expected because
surveys during its March-July blooming period did not find it.
Solano downingia – Downingia ornatissima var. eximia – CNPS A1x
Solano downingia is an annual herb found in vernal pools and roadside ditches. Its range
includes the Sacramento Valley and the San Joaquin Valley in California (Hickman 1993).
Although potentially suitable habitat for this taxon is present in beds of seasonal ponds located at
the east end of the site’s development area, Solano downingia is not expected because surveys
during its April-May blooming period did not find it.
Dwarf downingia – Downingia pusilla – CNPS 2
Dwarf downingia is an annual herb in the bellflower family (Campanulaceae), 3 to 8 cm tall,
with small linear leaves. Its small, radially symmetric flowers are less than 1 cm across, in
contrast to all other Downingia species, which have larger, showy, asymmetric flowers. The
flowers, borne at the ends of branches, are white or blue with two small yellow spots near the
throat (Hickman 1993).
21
Dwarf downingia grows in vernal pools, playa pools, and on margins of vernal lakes other mesic
areas within valley and foothill grassland, both in alkaline (saline) and nonalkaline soils. It
occurs with other rare wetland and vernal pool species such as alkali milk-vetch (Astragalus
tener var. tener), legenere (Legenere limosa), Bogg’s Lake hedge-hyssop (Gratiola
heterosepala), Heckard’s peppergrass (Lepidium latipes var. heckardii) and little mouse-tail
(Myosurus minimus ssp. apus). It flowers March through May (Hickman 1993, CNDDB 2007,
CNPS 2003). Dwarf downingia is found from Merced and Mariposa counties in the south to
Tehama County in the north (CNPS 2003). The species is threatened by urbanization,
development, agriculture, grazing, vehicles, and industrial forestry.
There are no records of this species within five miles of the project site. Although there is
suitable habitat on site for this species, it was not seen in the development area during focused
surveys during its flowering period, so is not expected to occur on site.
Squirreltail – Elymus elymoides ssp. elymoides – CNPS A2
Squirreltail is a perennial herb found in grasslands and dry, open areas. Its range includes the
San Francisco Bay Area, the Transverse Ranges, the San Jacinto Mountains, the Great Basin
Floristic Province and Desert in California (Hickman 1993). Rocky slopes in chaparral and
woodland that could provide potentially suitable habitat for this taxon are present in the site’s
development area on the north slopes of the ridge south of Horse Valley, but surveys during its
June-August blooming period did not find it; therefore it is not expected to occur on site.
Cleistogamous boisduvalia – Epilobium cleistogamum – CNPS A1x
Cleistogamous boisduvalia is an annual herb found in vernal pools and clay flats. Its range
includes the Sierra Nevada Foothills, the Great Central Valley and the Outer South Coast Ranges
within California (Hickman 1993). Although potentially suitable habitat for this species is
present in beds of seasonal ponds located at the east end of the site’s development area,
cleistogamous boisduvalia is not expected to occur on site because surveys during its April-June
blooming period did not find it.
Abram’s eriastrum – Eriastrum abramsii – CNPS A1
Abram’s eriastrum is an annual herb found on dry open slopes. Its range includes the Inner
North Coast Ranges, the San Francisco Bay Area and the Inner South Coast Ranges within
California (Hickman 1993). Although chaparral habitat potentially suitable for this species is
present in the site’s development area on the north slopes of the ridge south of Horse Valley,
Abram’s eriastrum is not expected to occur on site because a survey during its June-July
blooming period did not find it.
22
Many-flowered eriastrum – Eriastrum pluriflorum – CNPS A1
The many-flowered eriastrum is an annual herb found in chaparral, woodland and pine forests.
Its range includes central and southern Sierra Nevada Foothills, the San Joaquin Valley, the San
Francisco Bay Area, eastern South Coast Ranges and the western Mojave Desert (Hickman
1993). Although prairie habitat potentially suitable for this species is widespread in the site’s
development area, the many-flowered eriastrum is not expected to occur on site because surveys
during its May-July blooming period did not find it.
Golden-fleece – Ericameria arborescens – CNPS A2
Golden-fleece is a shrub found in chaparral, woodland and forest habitats, especially after fire.
Its range includes the Klamath Ranges, the North Coast Ranges, the Sierra Nevada Foothills, the
southern High Sierra Nevada (<2900 m), the San Francisco Bay Area, the South Coast Ranges
and the Western Transverse Ranges in California (Hickman 1993). Woodland and chaparral
habitat potentially suitable for this unmistakable large shrub is present in the southern and
western parts of the site’s development area, but surveys did not find it, so golden-fleece is not
expected to occur on site.
Angle-stemmed eriogonum – Eriogonum angulosum – CNPS A2
The angle-stemmed eriogonum is an annual herb found in sand or clay soils. Its range includes
the central and southern Sierra Nevada Foothills, the Tehachapi Mountain Area, the San Joaquin
Valley, Central Western California, the Transverse Ranges, the southern Peninsular Ranges and
western Mojave Desert in California (Hickman 1993). Although prairie habitat potentially
suitable for this species is widespread in the site’s development area, its occurrence on site is not
expected because surveys during its May-November blooming period did not find it.
Golden carpet – Eriogonum luteolum var. luteolum – CNPS A2
Golden carpet is an annual herb found on serpentine, sand or granite. Its range includes
Northwestern California, the Cascade Range, northern and central Sierra Nevada and the San
Francisco Bay Area in California (Hickman 1993). Some rock outcrop and otherwise barren
habitat potentially suitable for this taxon is present in the site’s development area, but a survey
during its June-September blooming period did not find it; therefore its occurrence is not
expected on site.
Naked-stemmed buckwheat – Eriogonum nudum var. pubiflorum – CNPS A1
The naked-stemmed buckwheat is an annual herb found on dry open slopes. Its range within
California includes Northwestern California, the Cascade Range, Sierra Nevada, the Sacramento
Valley, the San Francisco Bay Area and the Mojave Desert (Hickman 1993). Although prairie
habitat potentially suitable for this taxon is widespread in the site’s development area, its
23
occurrence on site is not expected because a survey during its June-September blooming period
did not find it.
Mount Diablo Buckwheat – Eriogonum truncatum – CNPS 1A, CNPS *A1
The Mount Diablo buckwheat is an annual herb, 10-70 cm in height, with white to rose colored
flowers from mid-April to May (although records show April to December, with May most
common). It is an annual found on sandy soils or barren clay spots of chaparral, coastal scrub
and valley and foothill grassland habitats. It is found on dry slopes at 300-600 m elevation. Its
range includes the Bay area and the San Joaquin Valley (Hickman 1993). It was thought to be
extinct since 1936, but was rediscovered in 2005 in a remote corner of Mt. Diablo State Park. It
is thought that competition by introduced non-native plants is responsible for its rarity. In recent
years, its historic habitat has been threatened by development pressure (CNPS 2007).
The closest CNDDB occurrence record of this species is 1.38 miles from the project site in 1934
(Figure 4). Although sandy prairie habitat potentially suitable for this species is present in the
northwestern part of the site’s development area, its occurrence on site is not expected because
surveys during its April-September blooming period did not find it.
Jepson’s woolly sunflower – Eriophyllum jepsonii – CNPS *A2
Jepson’s woolly sunflower is an annual herb found in chaparral, serpentine and dry oak
woodland habitats. Its range includes eastern Central Western California (Hickman 1993).
Although woodland and chaparral habitat potentially suitable for this species is present in the
site’s development area on the north slopes of the ridge south of Horse Valley, Jepson’s woolly
sunflower is not expected on site because surveys during its April-June blooming period did not
find it.
Round-leaved filaree – Erodium macrophyllum – CNPS 2
This annual typically grows in valley and foothill grasslands in open habitat on friable clay soils.
This small annual is apparently well distributed in central and northern California, but is very
rare in Southern California. Round-leaved filaree is presumed to be declining in Southern
California due to loss of its friable clay microhabitat. All populations in Southern California are
recommended for protection despite the sizeable populations to the north. The very crumbly
clay soil is itself quite rare in the region and undoubtedly accounts for the rarity of several
species restricted to this substrate. The round-leaved filaree blooms from March to May (CNPS
2007).
There is a CNDDB occurrence record of this species within the Roddy Ranch site in 1994; this
was found in Deer Valley, outside of the development area (Figure 4). Although there is suitable
habitat on the development site for this species, it was not seen in the development area during
focused surveys during its flowering period, so is not expected to occur on the development site.
24
Vasey’s coyote-thistle – Eryngium vaseyi –CNPS A2
Vasey’s coyote-thistle is a perennial herb found in alkali areas and vernal pools. Its range
includes the Sacramento Valley, the Inner South Coast Ranges and the South Coast in California
(Hickman 1993). Although potentially suitable habitat for this species is present on the beds of
seasonal ponds at the eastern end of the site’s development area, Vasey’s coyote-thistle is not
expected to occur because a survey during its June-August blooming period did not find it on
site.
Tufted poppy – Eschscholzia caespitosa –CNPS A2
The tufted poppy is an annual herb found in chaparral habitats. Its range includes the California
Floristic Province, except the Channel Islands (Hickman 1993). Some rock outcrop and
otherwise barren habitat potentially suitable for this species is present in the site’s development
area, but tufted poppy is not expected because surveys during its March-June blooming period
did not find it on site.
Diamond-petalled California poppy – Eschscholzia rhombipetala – CNPS 1B,
CNPS *A1
The diamond-petalled California poppy is an annual herb found in valley and foothill grasslands.
Its range includes the San Joaquin Valley and the San Francisco Bay Area (Hickman 1993).
Although prairie habitat potentially suitable for this species is widespread in the site’s
development area, diamond-petalled California poppy is not expected to occur on site because a
plant survey in its March-April blooming period did not find it.
Desert olive – Forestiera pubescens –CNPS A2
Desert olive is a shrub found in riparian habitats and flowers from March to April. Its range
within California includes southern Sierra Nevada Foothills, central and southern High Sierra
Nevada (eastern slope), Tehachapi Mountain Area, eastern San Francisco Bay Area, Outer South
Coast Ranges (eastern slope), Inner South Coast Ranges, Transverse Ranges, Peninsular Ranges,
southeast of the Sierra Nevada and the Mojave Desert (Hickman 1993). Surveys of the site’s
development area did not find this unmistakable large shrub, which is an indicator of shallow
groundwater in arid and semiarid areas.
Flowering ash – Fraxinus dipetala –CNPS A2
The flowering ash is an annual herb found in canyons, slopes, chaparral and oak and pine
woodland habitats. Its range includes the North Coast Ranges, the Cascade Range Foothills,
northern Sierra Nevada Foothills, central and southern Sierra Nevada, Central Western
California, the Transverse Ranges and the Peninsular Ranges in California (Hickman 1993).
Although woodland and chaparral habitat potentially suitable for this unmistakable large shrub is
25
present in southern and western parts of the site’s development area, flowering ash is not
expected because surveys did not find it on site.
Stinkbells – Fritillaria agrestis –CNPS *A2
Stinkbells is a perennial herb found in alkali areas, grassland and clay depressions. Its range
includes the Outer North Coast Ranges (Mendocino Co.), the Sierra Nevada Foothills, the Great
Central Valley and Central Western California (Hickman 1993). Although prairie habitat
potentially suitable for this species is widespread in the site’s development area, stinkbells is not
expected to occur on site because a plant survey during its March-April blooming period did not
find it.
Fragrant fritillary – Fritillaria liliacea – CNPS 1B
Fragrant fritillary is a threatened perennial herb found in coastal scrub, valley and foothill
grassland, and coastal prairie. The range of this wildflower is over parts of southwestern
Northern California, especially Solano and Sonoma Counties and at coastal locations south to
Monterey County; occurrence is typically in open hilly grasslands at altitudes less than 200
meters in elevation. The bell-shaped white flowers have greenish stripes and are set on a
nodding pedicel of about 37 centimeters in height. The blossoms are odorless to faintly fragrant.
F. liliacea prefers heavy soils including clays; for example, andesitic and basaltic soils derived
from the Sonoma Volcanic soil layers are suitable substrate for this species. This California
endemic has been a candidate for listing as a U.S. Federally endangered species, and some of the
remaining fragmented colonies are at risk of local extinction, such that the species is considered
locally endangered. The species is threatened by grazing, agriculture, urbanization and nonnative plants (CNPS 2007).
There are no known records of occurrence of this species within five miles of the project site.
Although there is suitable habitat on site for this species, it was not seen in the development area
during focused surveys during its flowering period; consequently it is not expected to occur on
site.
Serpentine Bedstraw – Galium andrewsii ssp. gatense – CNPS 4
Serpentine bedstraw (Galium andrewsii ssp. gatense) is a low-growing perennial member of the
madder family (Rubiaceae) arising from slender, woody roots. Plants generally form dense mats
of gray-green foliage on many-branched, tangled stems. Leaves are needle-like, less than one
half inch long, and arranged on the branches in whorls of four. Plants are monoecious, the male
and female flowers being borne separately on the same plant. Flowers are inconspicuous, the
corollas greenish white and less than an eighth of an inch wide. The fruit is round, smooth,
berry-like, and similar to the flowers in size. Serpentine bedstraw flowers from April to July.
The species occurs on dry, rocky slopes, in chaparral or open oak and pine woodland, often on
serpentine soils (Hickman 1993). It occurs in the Coast Ranges from Contra Costa and possibly
Alameda counties, south to San Luis Obispo and Fresno counties. Black Diamond Mines
26
Regional Park, just to the north of the site, represents the northernmost known occurrence of the
subspecies (CNPS 2007).
Botanical surveys on the Roddy Ranch site during spring and summer of 1998 (Sycamore
Associates) identified 11 populations of serpentine bedstraw within blue oak woodland in Deer
Valley (Figure 3). Plants were not enumerated within distinct populations because of the habit
of the species to form dense, clonal mats rather than easily distinguishable individuals. Sizes of
colonies in the study area range from five or six inches across to several square yards. Within
Roddy Ranch, it occurs entirely on soils derived from sedimentary rocks. It was not seen in the
development site during focused surveys during its flowering period, so it is not expected to
occur within the development site.
Southern bluecup – Githopsis diffusa ssp. robusta – CNPS A2
Southern bluecup is an annual herb found in shaded or disturbed areas and recent burns. Its
range within California includes the Klamath Ranges, the North Coast Ranges, the Cascade
Range Foothills, northern and central Sierra Nevada Foothills, the San Francisco Bay Area and
the South Coast Ranges (Hickman 1993). Although woodland and chaparral habitat potentially
suitable for this taxon is present in the southern and western parts of the site’s development area,
southern bluecup is not expected to occur on site because surveys during its April-June blooming
period did not find it.
Davy’s mannagrass – Glyceria leptostachya – CNPS A1
Davy’s mannagrass is a perennial herb found in freshwater marshes and riparian habitats. Its
range within California includes Northwestern California, the Central Coast and the San
Francisco Bay Area (Hickman 1993). Although wetland habitat potentially suitable for this
species is present around permanent and seasonal ponds in the site’s development area, Davy’s
mannagrass is not expected to occur on site because surveys in its May-June blooming period did
not find it.
Bioletti’s cudweed – Gnaphalium bicolor – CNPS A2
Bioletti’s cudweed is a perennial herb found on dry open slopes and sand or sandstone. Its range
within California includes central and southern Sierra Nevada Foothills, the Central Coast, the
South Coast Ranges, the South Coast, the San Jacinto Mountains and the Channel Islands
(Hickman 1993). Although woodland and chaparral habitat potentially suitable for this
unmistakable perennial taxon is present in western and southern parts of the site’s development
area, Bioletti’s cudweed is not expected to occur on site because focused surveys did not find it.
Yellow-flowered thelypodium – Guillenia flavescens – CNPS A1
Yellow-flowered thelypodium is an annual herb found on serpentine soils. Its range within
California includes the southern Inner North Coast Ranges, the Sacramento Valley (Montezuma
27
Hills), southeastern San Francisco Bay Area and the Inner South Coast Ranges (Hickman 1993).
Although prairie habitat potentially suitable for this species is widespread in the site’s
development area, yellow-flowered thelypodium is not expected to occur on site because a plant
survey during its March-April blooming period did not find it.
Diablo helianthella – Helianthella castanea – CNPS 1B
Diablo helianthella is a stout perennial herb in the sunflower family (Asteraceae), growing from
a much branched caudex. Leaves are mostly basal and tufted, the blades oblong to oblanceolate,
entire-margined and ranging from three to eight inches long. Heads are solitary and borne on a
long peduncle from between 6 and 20 inches tall, the involucres generally subtended by 3 or 4
foliaceous bracts. Heads are large, with 12 to 20 showy yellow ligules and a broad yellow disk.
Flowers appear from April to June (Hickman 1993). Diablo helianthella grows on slopes and
hillsides in grassland, open woods, and chaparral, and is most frequently encountered at the
interface between chaparral and adjacent plant communities. It is known from Alameda, Contra
Costa and San Mateo counties but is believed extirpated in San Francisco and Marin counties.
Loss of historical populations is thought to be due to urbanization, grazing and fire suppression
(CNPS 2007).
During botanical surveys in spring and summer of 1998 (Sycamore Associates), 13 populations
of Diablo helianthella were located at the Roddy Ranch site, ranging in size from as many as 47
individuals to a single plant (Figure 3). The total number of individuals of Diablo helianthella
on the entire Roddy Ranch property is estimated at approximately 172. Within the project site,
Diablo helianthella is restricted entirely to north-facing slopes along the ridge to the south of
Deer Valley, outside of the development area. Diablo helianthella was not observed in the
development site during focused surveys during its blooming period in 2006 and is not expected
to be found in the development site.
Fire evax – Hesperevax acaulis var. ambusticola – CNPS A2
Fire evax is an annual herb found on bare, generally burned slopes. Its range within California
includes the southern Inner North Coast Ranges, central to southern Sierra Nevada Foothills,
eastern San Francisco Bay Area, the Outer South Coast Ranges and the Peninsular Ranges
(Hickman 1993). This taxon occurs exclusively or nearly exclusively on recent burns. A burn
did occur on site in the summer of 2006, but fire evax is not expected to occur on site because a
survey during its April-May blooming period did not find it.
Hogwallow starfish – Hesperevax caulescens – CNPS *A2
Hogwallow starfish is an annual herb found in vernal pools. Its range within California includes
the southern Sierra Nevada Foothills, northern and central Great Central Valley and the
southwestern Peninsular Ranges (Hickman 1993). Although potentially suitable habitat for this
species is present in beds of seasonal ponds at the eastern end of the site’s development area,
hogwallow starfish is not expected to occur on site because surveys during its April-June
blooming period did not find it.
28
Brewer's western flax – Hesperolinon breweri – CNPS 1B
Brewer’s western flax is an annual herb endemic to California found in chaparral, valley
grassland, and foothill woodland habitats. Its range is limited to Contra Costa, Napa, and Solano
Counties. It blooms from May to July (Hickman 1993).
The closest CNDDB occurrence record of this species is 2.5 miles from the project site in 1973
(Figure 4). Although there is suitable habitat on site for this species, it was not seen in the
development area during focused surveys during its flowering period, so is not expected to occur
on site.
Heterodraba – Heterodraba unilateralis – CNPS A1
Heterodraba is an annual herb found in grasslands. Its range within California includes the
Cascade Range Foothills, southern Sierra Nevada Foothills, the Tehachapi Mountain Area, the
Great Central Valley and the South Coast Ranges (Hickman 1993). Although prairie habitat
potentially suitable for this species is widespread in the site’s development area, heterodraba is
not expected to occur on site because a plant survey during its March-April blooming period did
not find it.
Prostrate hutchinsia – Hutchinsia procumbens – CNPS A2
Prostrate hutchinsia is an annual herb found in alkali habitats. Its can be found all throughout
California, except Klamath Ranges and the High Sierra Nevada (Hickman 1993). Although
alkaline habitat potentially suitable for this species is present in the northeastern part of the site’s
development area along Empire Mine Road, prostrate hutchinsia is not expected to occur on site
because surveys during its March-July blooming period did not find it.
Howell’s quillwort – Isoetes howellii – CNPS A2
Howell’s quillwort is a perennial herb found in vernal pools and lake margins. Its range within
California includes the Klamath Ranges, the North Coast Ranges, the Cascade Range, the Sierra
Nevada Foothills, the Great Central Valley, the San Francisco Bay Area, the South Coast
Ranges, the South Coast and the Peninsular Ranges (Hickman 1993). Although potentially
suitable habitat for this species is present in beds of seasonal ponds at the eastern end of the site’s
development area, Howell’s quillwort is not expected to occur on site because surveys during its
March-June maturation period did not find it.
Toad rush – Juncus bufonius var. occidentalis – CNPS A1x
Toad rush is an annual herb found in riparian habitats and vernal pools. Its range includes all of
California (Hickman 1993). Although potentially suitable habitat for this taxon is present in
29
beds of seasonal ponds at the eastern end of the site’s development area, toad rush is not
expected to occur on site because surveys during its April-August blooming period did not find
it.
Ahart's dwarf rush – Juncus leiospermus var. ahartii – CNPS 1B
Ahart’s dwarf rush is a small, reddish, grass-like plant from 2 to 6 centimeters (0.8 to 2.4 inches)
tall. Each plant may produce as many as 100 slender stems from its base, but the individual
stems do not branch. The grass-like leaves arise from the base and are about half as long as the
stems. Each stem produces only a single, tiny flower at its tip. It is an annual that flowers in
April and May. The species occurs in the valley and foothill grasslands (Hickman 1993).
It is currently known to be extant from nine occurrences in Butte, Calaveras, Placer, Sacramento,
Tehama, and Yuba Counties. This taxon is believed to remain extant on the Ahart Ranch and
near Jenny Lind, although these sites have not been revisited since 1991. In addition, Juncus
leiospermus var. ahartii has been found at the Oroville Municipal Airport in Butte County, near
the Lincoln Airport in Placer County and in the Buffalo Creek area of Sacramento County
(CDFG 2007). Thus, a total of nine occurrences are presumed to be extant and one is presumed
to be extirpated in Sacramento County. All are in either the Northeastern Sacramento Valley or
the Southeastern Sacramento Valley Vernal Pool Regions (Keeler-Wolf et al. 1998).
There are no known records of occurrence of this species within five miles of the project site.
Although there is suitable habitat on site for this species, it was not seen in the development area
during focused surveys during its flowering period; consequently it is not expected to occur on
site.
Lastarriaea – Lastarriaea coriacea – CNPS A1
Lastarriaea is an annual herb found in chaparral habitats, scrub habitats, sand or sandstone and
gravel. Its range within California includes the Sierra Nevada, the Great Central Valley, Central
Western California and Southwestern California (Hickman 1993). Although sandy prairie
habitat potentially suitable for this species is present in the northwestern part of the site’s
development area, lastarriaea is not expected to occur on site because surveys during its AprilJune blooming period did not find it.
Contra Costa goldfields – Lasthenia conjugens – FE, CNPS 1B
Contra Costa goldfields is a showy herb in the Asteraceae family. It grows to between 4 and 12
inches and has opposite, green leaves and an infrequently branched stem. The blooming period
is from March through June and it has specialized adaptations to allow it to exist in vernal pools.
The species is an annual, which allows it to complete its life cycle within the time period of
vernal pool inundation and drying and also produces dormant seeds that allow them to survive
through the dry summers until they can germinate when the winter rains come (Hickman 1993).
Contra Costa goldfields is known from only 20 extant occurrences. Eleven of these occurrences
30
are from areas east and south of the City of Fairfield in Contra Costa County. The species has
also been recorded in Alameda, Napa, and Solano Counties and has been extirpated from Santa
Barbara, Santa Clara, and Mendocino Counties (CDFG 2007). The species is found in vernal
pools (Northern Basalt Flow, Northern Claypan, and Northern Volcanic Ashflow), swales, and
moist depressions and flats in cismontane woodland and valley and foothill grassland between 0
and 470 meters elevation in clay or loam soils. Historical observations included many
occurrences in the transition zone between vernal pools and tidal marshes on the eastern side of
the San Francisco Bay. Development, agriculture land conversion, overgrazing, non-native
invasive plants, and creek channelizing threaten nearly all remaining populations of this species
(CNPS 2007). Critical habitat for this species was declared in August 2003.
The closest CNDDB occurrence record of this species is 4.38 miles from the project site in 1895
(Figure 4); this is a historical population and has since been extirpated. Although there is
suitable habitat on site for this species, it was not seen in the development area during focused
surveys during its flowering period, so is not expected to occur on site.
Woolly goldfields – Lasthenia minor – CNPS A2
Woolly goldfields is an annual herb found in grasslands. Its range within California includes the
North Coast, southern Sacramento Valley, the San Joaquin Valley and the Central Coast
(Hickman 1993). Although prairie habitat potentially suitable for this species is widespread in
the site’s development area, woolly goldfields is not expected to occur on site because a plant
survey during its March-April did not find it.
Smooth layia – Layia chrysanthemoides – CNPS A2
Smooth layia is an annual herb found on grassy or open heavy soils. Its range within California
includes the North Coast, the North Coast Ranges, the Great Central Valley and Central Western
California (Hickman 1993). Although prairie habitat potentially suitable for this species is
widespread in the site’s development area, smooth layia is not expected to occur on site because
surveys in its March-May blooming period did not find it.
White layia – Layia glandulosa – CNPS A1x
White layia is an annual herb found on sand or sandstone. Its range within California includes
the High Cascade Range, High Sierra Nevada, southern Sierra Nevada Foothills (rare), the
Tehachapi Mountain Area, the San Joaquin Valley, Central Western California, Southwestern
California (except the Channel Islands), the Great Basin Floristic Province and Desert (Hickman
1993). Although sandy prairie habitat potentially suitable for this species is present in the
northwestern part of the site’s development area, white layia is not expected to occur on site
because surveys during its March-June blooming period did not find it.
31
Jared's peppergrass – Lepidium jaredii – CNPS 1B
Jared's peppergrass is an annual, but few plants bloom in dry years. It flowers from February to
June. Jared's peppergrass has narrow leaves, which occasionally have a few teeth on the
margins. Each plant has many small, four-petalled flowers, which are distributed along the
upper portions of each branch. The flattened, egg-shaped fruits contain two seeds each
(Hickman 1993).
Jared's peppergrass ranges from San Benito County south to San Luis Obispo County. It is
found in valley and foothill grasslands with alkaline and adobe soils. Jared’s peppergrass
populations have been subject to disturbance from sand and gravel quarrying. Trampling by
cattle is also a possible threat to populations of this species (CNPS 2007).
There are no known records of occurrence of this species within five miles of the project site.
Although there is suitable habitat on site for this species, it was not seen in the development area
during focused surveys during its flowering period; consequently it is not expected to occur on
site.
Shining pepper-grass – Lepidium nitidum var. oreganum – CNPS A1
Shining pepper-grass is an annual herb found in dry lake beds, alkaline soils, rain pools, flats and
valleys. Its range within California includes the North Coast, the Great Central Valley, the
Central Coast and the Outer South Coast Ranges (Hickman 1993). Although alkaline prairie
habitat potentially suitable for this taxon is present along Empire Mine Road in the northeastern
part of the site’s development area, shining pepper-grass is not expected to occur on site because
surveys during its February-May blooming period did not find it.
Valley lessingia – Lessingia glandulifera var. glandulifera – CNPS A2
Valley lessingia is an annual herb found in sandy soils, coastal habitats, desert washes and pine
forests. Its range within California includes the Sierra Nevada Foothills, the San Joaquin Valley,
the San Francisco Bay Area, the South Coast Ranges, South Coast, Transverse Ranges,
Peninsular Ranges (Hickman 1993). Although sandy prairie habitat potentially suitable for this
taxon is present in the northwestern part of the site’s development area, valley lessingia is not
expected to occur on site because surveys during its May-November blooming period did not
find it.
Slender-stemmed lessignia – Lessingia nemaclada – CNPS A1
Slender-stemmed lessingia is an annual herb found in open fields, gravelly roadcuts and borders
of woodlands. Its range within California includes Northwestern California, the Cascade Range,
Sierra Nevada, the Great Central Valley, the San Francisco Bay Area and Inner South Coast
Ranges (Hickman 1993). Although prairie habitat potentially suitable for this species is
widespread in the site’s development area, slender-stemmed lessignia is not expected to occur on
site because surveys in its May-October blooming period did not find it.
32
Pigmy linanthus – Linanthus pygmaeus ssp. continentalis – CNPS A1
Pigmy linanthus is an annual herb found in dry open areas. Its range within California includes
the Sierra Nevada Foothills, the Great Central Valley, Central Western California and
Southwestern California, except the Channel Islands (Hickman 1993). Although sandy prairie
and woodland habitat potentially suitable for this taxon is present in the northwestern part of the
site’s development area, pigmy linanthus is not expected to occur on site because surveys during
its April-June blooming period did not find it.
Bolander starflower – Lithophragma bolanderi – CNPS A2
Bolander starflower is a perennial subshrub found on open slopes. Its range within California
includes the North Coast Ranges, the Cascade Range Foothills, the Sierra Nevada Foothills, the
San Francisco Bay Area and the San Gabriel Mountains (Hickman 1993). Although woodland
habitat potentially suitable for this species is present in the southern and western parts of the
site’s development area, Bolander starflower is not expected to occur on site because surveys
during its February-June blooming period did not find it.
Mission star – Lithophragma cymbalaria – CNPS A1x
Mission star is a perennial subshrub found in forest, riparian and woodland habitats. Its range
within California includes the San Francisco Bay Area, the South Coast Ranges, the Western
Transverse Ranges, the San Gabriel Mountains and the northern Channel Islands (Hickman
1993). Although woodland habitat potentially suitable for this species is present in the southern
and western parts of the site’s development area, mission star is not expected to occur on site
because surveys during its March-May blooming period did not find
Caraway-leaved lomatium – Lomatium caruifolium var. caruifolium – CNPS A2
Caraway-leaved lomatium is a perennial herb found on adobe of wet depressions and grasslands.
Its range within California includes the North Coast Ranges (Mendocino County), central and
southern Sierra Nevada Foothills, the San Francisco Bay Area, the South Coast Ranges and the
Channel Islands (Hickman 1993). Although prairie habitat potentially suitable for this taxon is
widespread in the site’s development area, caraway-leaved lomatium is not expected to occur on
site because surveys during its March-May blooming period did not find it.
Strigose trefoil – Lotus strigosus – CNPS A2
Strigose trefoil is an annual herb found in coastal scrub, chaparral, foothills, deserts, roadsides
and other disturbed areas. Its range within California includes the Great Central Valley, Central
Western California, Southwestern California and Desert (Hickman 1993). Although woodland
and chaparral habitat potentially suitable for this species is present in the western and southern
33
parts of the site’s development area, strigose trefoil is not expected to occur on site surveys
during its March-June blooming period did not find it.
Lupine – Lupinus affinis – CNPS A1
Lupine is an annual herb found in open areas. Its range within California includes the North
Coast Ranges and the San Francisco Bay Area (Hickman 1993). Although prairie habitat
potentially suitable for this species is widespread in the site’s development area, lupine is not
expected to occur on site because surveys during its March-May blooming period did not find it.
Miniature lupine – Lupinus bicolor var. tridentatus – CNPS A1
Miniature lupine is an annual herb found in open or disturbed habitats. Its range includes the
entire California Floristic Province (Hickman 1993). Prairie habitat potentially suitable for this
taxon is widespread in the site’s development area, and surveys during its March-June blooming
period determined that L. bicolor is common there. No attempt to distinguish its many named
varieties was made, however, because neither the Jepson Manual (Hickman 1993) nor recent
local floristic treatments (Ertter 1997; Ertter & Bowerman 2002) recognize these minor variants
specifically including L. b. tridentatus.
Bajada lupine – Lupinus concinnus – CNPS A1
Bajada lupine is an annual shrub found in open or disturbed areas and burned areas. Its range
within California includes central and southern Central Western California, Southwestern
California and Desert (Hickman 1993). Although sandy barrens that may provide suitable
potential habitat for this species are locally present in the northwestern part of the site’s
development area, Bajada lupine is not expected to occur on site because surveys during its
March-June blooming period did not find it.
Showy madia – Madia radiata – CNPS 1B
Showy madia is an annual herb that reaches 10 to 90 cm with showy flowers. It has glandularpubescent stems, yellowish or purple glands and lateral branches often surpassing main stems. Its
leaf blades are lanceolate to linear. The species flowers from March to May (Hickman 1993).
Showy madia is found in valley and foothill grasslands, openings in woodlands or chaparral,
disturbed sites, usually in heavy, clayey soils, often from decomposed shale. Madia radiata
occurs in the Inner South Coast Ranges and in the eastern San Francisco Bay area, although it is
considered extirpated from Contra Costa County (Hickman 1993).
The closest CNDDB occurrence record of this species is 1.21 miles from the project site in 1938
(Figure 4). Although there is suitable habitat on site for this species, it was not seen in the
development area during focused surveys during its flowering period, so is not expected to occur
on site.
34
California malacothrix – Malacothrix californica – CNPS A1x
California malacothrix is an annual herb found in open areas, sandy soils in grasslands, oak
woodlands, chaparral and desert margins. Its range within California includes the San Joaquin
Valley, Central Western California, Southwestern California and the Mojave Desert (Hickman
1993). Although sandy prairie habitat potentially suitable for this species is present in the
northwestern part of the site’s development area, California malacothrix is not expected to occur
on site because surveys in its March-May blooming period did not find it.
Cleveland’s malacothrix – Malacothrix clevelandii – CNPS A1
Cleveland’s malacothrix is an annual herb found in cleared areas (i.e. burns and slides) and
chaparral. Its range within California includes Northwestern California, the Sierra Nevada
Foothills, the San Joaquin Valley, Central Western California and the northern Channel Islands
(Santa Rosa Island) (Hickman 1993). A portion of the site was burned in the summer of 2006,
but Cleveland’s malacothrix is not expected to occur on site because surveys during its AprilJune blooming period did not find it.
Snake’s-head – Malacothrix coulteri – CNPS A1
Snake’s-head is an annual herb found in grasslands, scrub, sand or sandstone. Its range within
California includes the San Joaquin Valley, Central Western California, the Western Transverse
Ranges, the Peninsular Ranges, east of Sierra Nevada and the Mojave Desert (Hickman 1993).
Although sandy prairie habitat potentially suitable for this species is present in the northwestern
part of the site’s development area, snake’s-head is not expected to occur on site because surveys
in its March-May blooming period did not find it.
Narrow-leaved meconella – Meconella linearis – CNPS A1x
Narrow-leaved meconella is an annual herb found in dry washes, grassland, sand or sandstone.
Its range within California includes western Northwestern California, southern Sierra Nevada
Foothills, Central Western California and western Southwestern California (Hickman 1993).
Although sandy prairie and woodland habitat potentially suitable for this species is present in the
northwestern part of the site’s development area, narrow-leaved meconella is not expected to
occur on site because surveys during its March-June blooming period did not find it.
Hydra stick-leaf – Mentzelia affinis – CNPS A2
Hydra stick-leaf is an annual herb found in grassland, sand or sandstone, and woodland habitats.
Its range within California includes southern Sierra Nevada, the San Joaquin Valley,
southeastern San Francisco Bay Area (Mount Hamilton), the Inner South Coast Ranges, the
Transverse Ranges, the San Jacinto Mountains and Desert (Hickman 1993). Although sandy
35
prairie habitat potentially suitable for this species is present in the northwestern part of the site’s
development area, hydra stick-leaf is not expected to occur on site because surveys during its
March-June blooming period did not find it.
Nada stick-leaf – Mentzelia dispersa – CNPS A1
Nada stick-leaf is an annual herb found on sandy or rocky soils. Its range within California
includes the California Floristic Province and the Great Basin Floristic Province (Hickman
1993). Although sand barren habitat potentially suitable for this species is present in the
northwestern part of the site’s development area, nada stick-leaf is not expected to occur on site
because surveys during its May-July blooming period did not find it.
Slender cottonweed – Micropus californicus var. subvestitus – CNPS A1x
Slender cottonweed is an annual herb found in dry places. Its range within California includes
the central Sierra Nevada Foothills (very uncommon) and Central Western California (except
Inner South Coast Ranges) (Hickman 1993). Although woodland and prairie habitat potentially
suitable for this taxon is widespread in the site’s development area, slender cottonweed is not
expected to occur on site because surveys during its March-June blooming period did not find it.
San Joaquin microseris – Microseris campestris – CNPS A2
San Joaquin microseris is an annual herb found in grasslands and vernal pools. Its range within
California includes central and southern Sierra Nevada Foothills, the San Joaquin Valley and
eastern Central Western California (Hickman 1993). Although prairie habitat potentially suitable
for this species is widespread in the site’s development area, San Joaquin microseris is not
expected to occur on site because surveys during its March-May blooming period did not find it.
Elegant microseris – Microseris elegans – CNPS A2
Elegant microseris is an annual herb found in grasslands and vernal pools. Its range within
California includes the North Coast Ranges, the Sierra Nevada Foothills, the Great Central
Valley, Central Western California, the South Coast and the Channel Islands (Hickman 1993).
Although prairie habitat potentially suitable for this species is widespread in the site’s
development area, elegant microseris is not expected to occur on site because surveys during its
March-May blooming period did not find it.
Sylvan microseris – Microseris sylvatica – CNPS *A1
Sylvan microseris is a perennial herb found in grasslands and open woods. Its range in
California includes the Inner North Coast Ranges, the Sacramento Valley, the Sierra Nevada
Foothills, the Tehachapi Mountain Area, eastern San Francisco Bay Area and the South Coast
Ranges (Hickman 1993). Although woodland and prairie habitat potentially suitable for this
36
species is widespread in the site’s development area, Sylvan microseris is not expected to occur
on site because surveys during its March-May blooming period did not find it.
Broad-toothed monkekyflower – Mimulus latidens – CNPS A1
Broad-toothed monkekyflower is an annual herb found in vernally wet depressions. Its range
within California includes the Inner North Coast Ranges, the Great Central Valley, Central
Western California and eastern South Coast (Menifee Valley, w Riverside Co.) (Hickman 1993).
Although potentially suitable habitat for this species is present in the beds of seasonal ponds at
the eastern end of the site’s development area, Broad-toothed monkekyflower is not expected to
occur on site because surveys during its April-June blooming period did not find it.
Robust monardella – Monardella villosa ssp. globosa – CNPS 1B
Robust monardella is a California endemic species. It is an open rhizomatous perennial herb
possessing a purple flower and standing more than 50 cm tall. The species flowers from June to
July (Hickman 1993). There are 25 known occurrences in the northern part of the state from
Santa Cruz to Humboldt counties, near the coast (CDFG 2007).
Robust monardella can be found in openings in broadleaved upland forest, chaparral, cismontane
woodland, and in valley and foothill grasslands between 100 and 915 m (330-3,000 ft). It can
also be founding openings in coastal scrub. There is one reported occurrence of robust
monardella in serpentine chaparral in Sonoma County (CDFG 2007).
Rural development is a continued threat to the species’ habitat. Pig rooting may also be a threat
to the species in oak woodland habitats. Competition from non-native grasses and herbs may
also threaten the species (CDFG 2007).
There are no known records of occurrence of this species within five miles of the project site.
Although there is suitable habitat on site for this species, it was not seen in the development area
during focused surveys during its flowering period; consequently it is not expected to occur on
site.
Little mousetail – Myosurus minimus ssp. apus – CNPS *A1
Little mousetail is an annual herb found in alkali areas, freshwater marshes and vernal pools. Its
range within California includes Alameda, Contra Costa, Colusa, Lake, Merced, Riverside, San
Bernardino, San Diego, Solano and Tulare Counties (Hickman 1993). Although potentially
suitable habitat for this taxon is present in the beds of seasonal ponds at the eastern end of the
site’s development area, little mousetail is not expected to occur on site because surveys during
its April-June blooming period did not find it.
37
Common mouse-tail – Myosurus minimus ssp. minimus – CNPS A2
Common mouse-tail is an annual herb found in vernal pools and freshwater marshes. Its range
within California includes the North Coast Ranges, the Cascade Range Foothills, the Sierra
Nevada Foothills, the Great Central Valley, the San Francisco Bay Area, the southern Outer
South Coast Ranges, the South Coast, the San Jacinto Mountains, the Modoc Plateau and the
White and Inyo Mountains (Hickman 1993). Although potentially suitable habitat for this taxon
is present in the beds of seasonal ponds at the eastern end of the site’s development area,
common mouse-tail is not expected to occur on site because surveys during its March-June
blooming period did not find it.
Sessile mouse-tail – Myosurus sessilis – CNPS A2
Sessile mouse-tail is an annual herb found in grasslands and vernal pools. Its range within
California includes the Great Central Valley (Hickman 1993). Although potentially suitable
habitat for this species is present in the beds of seasonal ponds at the eastern end of the site’s
development area, sessile mouse-tail is not expected to occur on site because surveys during its
March-April blooming period did not find it.
Holly-leaved navarretia – Navarretia atractyloides – CNPS A2
Holly-leaved navarretia is an annual herb found in open, rocky or sandy areas. Its range within
California includes the North Coast Ranges, the San Francisco Bay Area, the South Coast
Ranges, the Channel Islands, the Transverse Ranges and the Peninsular Ranges (Hickman 1993).
Although sandy barren habitat potentially suitable for this species is present in the northwestern
part of the site’s development area, holly-leaved navarretia is not expected to occur on site
because surveys during its May-July blooming period did not find it.
Cotula navarretia – Navarretia cotulifolia – CNPS *A1
Cotula navarretia is an annual herb found in heavy soils. Its range within California includes the
Inner North Coast Ranges, the Sacramento Valley, the San Francisco Bay Area and the Inner
South Coast Ranges (Hickman 1993). Although prairie habitat potentially suitable for this
species is widespread in the site’s development area, cotula navarretia is not expected to occur on
site because surveys during its May-June blooming period did not find it.
Adobe navarretia – Navarretia nigelliformis ssp. nigelliformis – CNPS 4
proposed
Adobe navarretia is an annual herb that flowers from April to May (Munz 1959). It has small
yellow flowers with brown spots below the petal lobes. The species occurs in heavy clay soils in
vernal pools and other low, seasonally moist areas of grasslands (Hickman, 1993). It appears to
be restricted to areas with a vernally moist, summer-dry hydrologic regime.
38
Adobe navarretia is reported to occur in the Sierra Nevada foothills, the Central Valley, and the
inner South Coast Ranges, between 325 and 3,300 feet elevation (Hickman 1993). Five
occurrences of adobe navarretia have been documented in the region since 1987, one of which
was in Horse Valley by Sycamore Associates in 1998 (Figure 3). Specific threats to adobe
navarretia are not known, although general threats to the species would be similar to those for
other vernal pool species, including habitat conversion. This species was not seen during 2006
surveys during its blooming period; it is possible that it has since been extirpated from the site
due to disturbance.
Sticky navarretia – Navarretia viscidula – CNPS A1
Sticky navarretia is an annual herb found in freshwater marshes, grasslands, sand or sandstone
areas and vernal pools. Its range within California includes the North Coast Ranges, the Sierra
Nevada Foothills and the San Francisco Bay Area (Hickman 1993). Although prairie habitat
potentially suitable for this species is widespread in the site’s development area, sticky navarretia
is not expected to occur on site because surveys during its May-July blooming period did not
find it.
Bulbous broom-rape – Orobanche bulbosa – CNPS A2
Bulbous broom-rape is an annual herb found in chaparral habitats. Its range within California
includes the southern Outer North Coast Ranges, the Inner North Coast Ranges, the Sierra
Nevada Foothills (Eldorado County south), the San Francisco Bay Area, the Outer South Coast
Ranges and Southwestern California (Hickman 1993). Although small amounts of chaparral
habitat potentially suitable for this species are present in the site’s development area on the north
slope of the ridge south of Horse Valley, bulbous broom-rape is not expected to occur on site
because a survey during its April-September blooming period did not find it.
Winged pectocarya – Pectocarya penicillata – CNPS A1
Winged pectocarya is an annual herb found in disturbed sites and roadsides in many
communities. Its range includes the California Floristic Province, the White and Inyo Mountains
and Desert (Hickman 1993). Although sandy prairie habitat potentially suitable for this species
is present in the northwestern part of the site’s development area, winged pectocarya is not
expected to occur on site because surveys during its March-May blooming period did not find it.
Indian breadroot – Pediomelum californicum – CNPS A1
Indian breadroot is a perennial herb found in chaparral and woodland habitats. Its range within
California includes the Inner North Coast Ranges, Central Western California, the Transverse
Ranges and the San Jacinto Mountains (Hickman 1993). Although woodland and chaparral
habitat potentially suitable for this species is present in the southern and western parts of the
site’s development area, Indian breadroot is not expected to occur on site because surveys during
its April-July blooming period did not find it.
39
Scarlet bugler – Penstemon centranthifolius – CNPS A2
Scarlet bugler is a perennial herb found in chaparral, sand or sandstone, and woodland habitats.
Its range within California includes the North Coast Ranges, the northern Sierra Nevada
Foothills, the Great Central Valley (margins), Central Western California, Southwestern
California and the southwestern edge of the Mojave Desert (Hickman 1993). Although chaparral
habitat potentially suitable for this species is present in the site’s development area on the north
slope of the ridge south of Horse Valley, scarlet bugler is not expected to occur on site because a
survey during its April-July blooming period did not find it.
Foothill penstemon – Penstemon heterophyllus var. purdyi – CNPS A2
Foothill penstemon is a perennial herb found in grassland, chaparral and forest habitats. Its
range within California includes Northwestern California, the Cascade Range Foothills, northern
Sierra Nevada Foothills, the Sacramento Valley, Central Western California and Southwestern
California (Hickman 1993). Although chaparral habitat potentially suitable for this taxon is
present in the site’s development area on the north slope of the ridge south of Horse Valley,
foothill penstemon is not expected to occur on site because a survey during its April-July
blooming period did not find it.
Tiny pentachaeta – Pentachaeta alsinoides – CNPS A1
Tiny pentachaeta is an annual herb found in grasslands. Its range within California includes the
Outer North Coast Ranges, the Sierra Nevada Foothills, the San Francisco Bay Area, the South
Coast Ranges and the western portion of the Western Transverse Ranges (Hickman 1993).
Although prairie habitat potentially suitable for this species is widespread in the site’s
development area, tiny pentachaeta is not expected to occur on site because surveys during its
April-May blooming period did not find it.
Meager pentachaeta – Pentachaeta exilis ssp. exilis – CNPS A1
Meager pentachaeta is an annual herb found in grassland habitats. Its range within California
includes the North Coast Ranges, the Sierra Nevada Foothills, the Great Central Valley and the
San Francisco Bay Area (Hickman 1993). Although prairie habitat potentially suitable for this
species is widespread in the site’s development area, meager pentachaeta is not expected to occur
on site because surveys during its April-May blooming period did not find it.
Brewer’s phacelia – Phacelia breweri – CNPS A2
Brewer’s phacelia is an annual herb found on rocky soils, slopes, chaparral and oak woodlands.
Its range within California includes the eastern San Francisco Bay Area and the northern Inner
South Coast Ranges (Hickman 1993). Rock outcrop habitat potentially suitable for this species
40
is scarce in the site’s development area, and Brewer’s phacelia is not expected to occur on site
because surveys during its April-May blooming period did not find it.
Divaricate phacelia – Phacelia divaricata – CNPS A2
Divaricate phacelia is an annual herb found in open areas, grasslands, chaparral and woodland
habitats. Its range within California includes the southern portion of Northwestern California,
the San Francisco Bay Area and the northern portion of the Inner South Coast Ranges (Hickman
1993). Although prairie habitat potentially suitable for this species is widespread in the site’s
development area, divaricate phacelia is not expected to occur on site because surveys in its
March-May blooming period did not find it.
Douglas’ phacelia – Phacelia douglasii – CNPS A1
Douglas’ phacelia is an annual herb found in open, generally sandy areas. Its range within
California includes the southern Sierra Nevada Foothills, the Tehachapi Mountain Area, southern
Sacramento Valley, the San Joaquin Valley, Central Western California, the Western Transverse
Ranges and the western portion of the Mojave Desert (Hickman 1993). Although sandy prairie
habitat potentially suitable for this species is present in the northwestern part of the site’s
development area, Douglas’ phacelia is not expected to occur on site because surveys during its
March-June blooming period did not find it.
Tansy phacelia – Phacelia tanacetifolia – CNPS A2
Tansy phacelia is an annual herb found on sandy and gravely slopes and open areas. Its range
within California includes the southern Outer North Coast Ranges, central and southern Sierra
Nevada Foothills, the Tehachapi Mountain Area, southern Sacramento Valley (Sutter Buttes), the
San Joaquin Valley, the eastern San Francisco Bay Area, the South Coast Ranges, Southwestern
California (except Channel Islands) and the Mojave Desert (Hickman 1993). Although prairie
habitat potentially suitable for this species is widespread in the site’s development area, tansy
phacelia is not expected to occur on site because surveys during its March-May blooming period
did not find it.
Coulter pine – Pinus coulteri – CNPS A2
Coulter pine is a tree found in chaparral, lower mixed-conifer forests and mixed-hardwood
forests. Its range includes Central Western California and Southwestern California (Hickman
1993). Although woodland habitat potentially suitable for this unmistakable large tree is present
in the southern part of the site’s development area on the north slope of the ridge south of Horse
Valley, Coulter pine is not expected to occur on site because a survey conclusively determined it
does not occur there.
41
Dye popcornflower – Plagiobothrys infectivus – CNPS A1
Dye popcornflower is an annual herb found on clay soils. Its range within California includes
the San Francisco Bay Area and the Inner South Coast Ranges (Hickman 1993). Although
prairie habitat potentially suitable for this species is widespread in the site’s development area,
dye popcornflower is not expected to occur on site because surveys during its March-May
blooming period did not find it.
Alkali plagiobothrys – Plagiobothrys leptocladus – CNPS A2
Alkali plagiobothrys is an annual herb found in generally alkaline clay soils in vernal pools and
wet areas. Its range includes Southwestern California and the western Mojave Desert (Hickman
1993). Although alkaline prairie habitat potentially suitable for this species is present along
Empire Mine Road in the northeastern part of the site’s development area, alkali plagiobothrys is
not expected to occur on site because surveys during its March-May blooming period did not
find it.
Slender popcornflower – Plagiobothrys tenellus – CNPS A2
Slender popcornflower is an annual herb found on dry slopes of grassland, scrub, woodland and
forest habitats. Its range includes the California Floristic Province, the Great Basin Floristic
Province (uncommon) and Desert (Hickman 1993). Although prairie habitat potentially suitable
for this species is widespread in the site’s development area, slender popcornflower is not
expected to occur on site because surveys during its March-June blooming period did not find it.
Long-spurred plectritis – Plectritis ciliosa ssp. insignis – CNPS A2
Long-spurred plectritis is an annual herb found in open and partially shaded slopes. Its range
includes the California Floristic Province, except the North Coast (Hickman 1993). Although
woodland habitat potentially suitable for this taxon is present in southern and western parts of the
site’s development area, long-spurred plectritis is not expected to occur on site because surveys
during its March-June blooming period did not find it.
Sacramento pogogyne – Pogogyne zizyphoroides – CNPS A1
Sacramento pogogyne is an annual herb found in vernal pools and depressions. Its range within
California includes the Outer North Coast Ranges, northern and central Sierra Nevada Foothills,
the Great Central Valley and the San Francisco Bay Area (Hickman 1993). Although potentially
suitable habitat for this species is present in the beds of seasonal ponds at the eastern end of the
site’s development areas, Sacramento pogogyne is not expected to occur on site because surveys
during its March-June blooming period did not find it.
42
Coast live oak X interior live oak – Quercus agrifolia X wislizeni – CNPS A1
Coast live oak X interior live oak is a tree found in scrub and woodland habitats. Its range
includes the North Coast Ranges, the Cascade Range Foothills, the Sierra Nevada Foothills, the
Tehachapi Mountain Area, the San Francisco Bay Area, the South Coast Ranges and
Southwestern California, except Channel Islands (Hickman 1993). Quercus wislizenii is
common in woodland habitat in western and southern parts of the site’s development area, but
surveys found no individuals of this species exhibiting characters suggesting hybridization with
Q. agrifolia.
Blue oak X valley oak – Quercus X jolonensis – CNPS A1
Blue oak X valley oak is a tree found in forest and woodland habitats. Its range includes the
North Coast Ranges, the Cascade Range Foothills, the Sierra Nevada Foothills, the Tehachapi
Mountain Area, the Great Central Valley, the San Francisco Bay Area, the South Coast Ranges,
the northwestern portion of the South Coast, the Channel Islands (Santa Cruz, Santa Catalina
islands), the Western Transverse Ranges and the western portion of the San Gabriel Mountains
(Hickman 1993). Quercus douglasii is abundant in woodland habitat in western and southern
parts of the site’s development area and Q. lobata is common near it, but surveys found no
individuals with intermediate characters suggesting hybridization between these species.
Western buttercup – Ranunculus occidentalis – CNPS A2
Western buttercup is a perennial herb found in meadows, flats, open woodlands and forest
habitats. Its range includes the California Floristic Province, except the Great Central Valley and
Southwestern California (Hickman 1993). Although woodland habitat potentially suitable for
this species is present in southern and western parts of the site’s development area, western
buttercup is not expected to occur on site because surveys during its March-May blooming
period did not find it.
Arrowhead – Sagittaria latifolia – CNPS A1
Arrowhead is a perennial herb found in ponds, slow streams, ditches and freshwater marshes. Its
range includes the California Floristic Province and the Great Basin Floristic Province (Hickman
1993). Although wetland habitat potentially suitable for this species is present around several
permanent and seasonal ponds located in the site’s development area, arrowhead is not expected
to occur on site because all the ponds were surveyed and this unmistakable large aquatic plant
was not found.
Parish’s glasswort – Salicornia subterminalis – CNPS A2
Parish’s glasswort is a perennial herb found in alkali areas and salt marshes. Its range within
California includes the San Joaquin Valley, the Central Coast, the San Francisco Bay Area, the
South Coast, the Channel Islands, western Mojave Desert and the Sonoran Desert (Hickman
43
1993). Although alkaline habitat potentially suitable for this unmistakable perennial species is
along Empire Mine Road in the northeastern part of the site’s development area, Parish’s
glasswort is not expected to occur on site because surveys did not find it.
Thistle sage – Salvia carduacea – CNPS A1x
Thistle sage is an annual herb found in sandy and rocky soils. Its range within California
includes the Tehachapi Mountain Area, the San Joaquin Valley, the eastern San Francisco Bay
Area, the Inner South Coast Ranges, Southwestern California and western Desert (Hickman
1993). Although sandy prairie potentially suitable for this species is present in the northwestern
part of the site’s development area, thistle sage is not expected to occur on site because surveys
during its March-June blooming period did not find it.
Rock sanicle – Sanicula saxatilis – FSC, SR, CNPS 1B
Rock sanicle is a low, stout, perennial herb in the carrot family (Apiaceae) with numerous
dissected basal leaves and small pale yellow flowers borne in round stalked clusters. It can be
found on rocky soil, rock outcrops, and talus slopes, usually within the chaparral plant
community, but sometimes in valley and foothill grasslands and broadleaved upland forests
(CDFG 2007).
About 10 occurrences of rock sanicle are known. In Contra Costa County, this species occurs on
the main and north peaks in Mount Diablo State Park. Several populations along trails there
appear stable and receive few impacts from hikers (CDFG 2007). There are no known records of
rock sanicle within five miles of the project site and the species was not seen during focused site
surveys during its blooming period in 2006, so it is not expected to occur on site.
River bulrush – Scirpus fluviatilis – CNPS A1
River bulrush is a perennial herb found in marshes. Its range within California includes the North
Coast Ranges, northern High Sierra Nevada, the Sacramento Valley, the San Francisco Bay Area and
the Modoc Plateau (Hickman 1993). Although small amounts of freshwater marsh habitat potentially
suitable for this species is present at edges of several permanent stock ponds in the site’s development
area, River bulrush is not expected to occur on site because surveys during its June-July blooming
period did not find it.
Scribner’s grass – Scribneria bolanderi – CNPS A1
Scribner’s grass is an annual herb found in dry, disturbed areas. Its range includes the California
Floristic Province, except most of Southwestern California (Hickman 1993). Although small
amounts of sandy barren habitat potentially suitable for this species are present in the
northwestern part of the site’s development area, Scribner’s grass is not expected to occur on site
because surveys during its March-June blooming period did not find it.
44
Rayless ragwort – Senecio aphanactis – CNPS 2, *A1
Rayless ragwort is an annual herb found on alkaline soils in coastal scrub and cismontane
woodlands. Its range within California includes Central Western California, the South Coast, the
Channel Islands and the San Francisco Bay Area (Hickman 1993). Although prairie habitat
potentially suitable for this species is widespread in the site’s development area, rayless ragwort
is not expected to occur on site because surveys during its February-April blooming period did
not find it.
Shrubby butterweed – Senecio flaccidus var. douglasii – CNPS A2
Shrubby butterweed is a subshrub found on dry, rocky or sandy sites. Its range includes the
California Floristic Province, except the North Coast and the Klamath Ranges (Hickman 1993).
Although small amounts of ephemeral streambed and other similar barren habitat potentially
suitable for this taxon are present in the site’s development area, shrubby butterweed is not
expected to occur on site because surveys during its February-November blooming period did
not find it.
Nest-straw – Stylocline gnaphaloides – CNPS A1
Nest-straw is an annual herb found in open, generally sandy areas. Its range within California
includes the southern Inner North Coast Ranges, the Sierra Nevada Foothills, the Tehachapi
Mountain Area, the San Joaquin Valley, Central Western California, Southwestern California
and southwestern Desert (Hickman 1993). Although sandy prairie and woodland habitat
potentially suitable for this species is present in the northwestern part of the site’s development
area, nest-straw is not expected to occur on site because surveys during its March-June blooming
period did not find it.
Ribbed fringe pod – Thysanocarpus radians – CNPS A2
Ribbed fringe pod is an annual herb found on moist slopes, pastures and open meadows. Its
range includes Northwestern California, the Sacramento Valley and the San Francisco Bay Area
(Hickman 1993). Although prairie habitat potentially suitable for this species is widespread in
the site’s development area, ribbed fringe pod is not expected to occur on site because surveys
during its March-May blooming period did not find it.
Bull clover – Trifolium gambelii – CNPS A1
Bull clover is an annual herb found in moist, open grasslands, ditches, marshes, roadsides, and
sometimes on saline or serpentine soils. Its range within California includes the North Coast, the
North Coast Ranges, the Cascade Range, the Great Central Valley, the San Francisco Bay Area,
the South Coast and Channel Islands (Hickman 1993). Although prairie habitat potentially
45
suitable for this species is widespread in the site’s development area, bull clover is not expected
to occur on site because surveys during its April-June blooming period did not find it.
Caper-fruited tropidocarpum – Tropidocarpum capparideum – CNPS 1B
The caper-fruited tropidocarpum is an annual herb native to California and was believed to be
extinct until rediscovery in 2000 on Fort Hunter Liggett. It has been found in valley and foothill
grasslands in the San Joaquin Valley. The species flowers from March to April. Possible threats
to this rare plant include grazing, trampling and non-native plants (CDFG 2007).
There are no known records of occurrence of this species within five miles of the project site.
Although there is suitable habitat on site for this species, it was not seen in the development area
during focused surveys during its flowering period; consequently it is not expected to occur on
site.
Slender tropidocarpum – Tropidocarpum gracile – CNPS A2
Slender tropidocarpum is an annual herb found in alkali areas and grasslands. Its range within
California includes the Inner North Coast Ranges, the Cascade Range Foothills, the Sierra
Nevada Foothills, the Tehachapi Mountain Area, the Great Central Valley, the San Francisco
Bay Area, the Inner South Coast Ranges, Southwestern California and the western Mojave
Desert (Hickman 1993). Although prairie habitat potentially suitable for this species is
widespread in the site’s development area, slender tropidocarpum is not expected to occur on site
because surveys during its March-May blooming period did not find it.
Slender vetch – Vicia hassei – CNPS A2
Slender vetch is an annual herb found on grassy or shrubby slopes and canyons. Its range within
California includes the North Coast, the North Coast Ranges, the Great Central Valley, Central
Western California, Southwestern California and the Peninsular Ranges (Hickman 1993).
Although prairie and woodland habitat potentially suitable for this species is widespread in the
site’s development area, slender vetch is not expected to occur on site because surveys during its
March-June blooming period did not find it.
Hairy-leaved fescue – Vulpia microstachys var. confusa – CNPS A2
Hairy-leaved fescue is an annual herb found in coastal-sage scrub, yellow-pine forests, grassy
plains and dry hillsides. Its range includes California Floristic Province (Hickman 1993). Prairie
habitat potentially suitable for this taxon is widespread in the site’s development area. Plant
surveys during its March-June blooming period did not find it, but a faunal survey reported
Vulpia microstachys from sandy prairie in the northwestern part of the development without
identifying its variety.
46
Nuttal’s fescue – Vulpia microstachys var. microstachys – CNPS A2
Nuttal’s fescue is an annual herb found in Dry hillsides, coarse, sandy soils, crumbling
serpentine or shale, open woodlands. Its range includes California, especially the California
Floristic Province (Hickman 1993). Prairie and chaparral habitat potentially suitable for this
taxon is widespread in the site’s development area. Plant surveys during its April-June blooming
period did not find it, but a faunal survey reported V. microstachys from sandy prairie in the
northwestern part of the development area without identifying its variety.
Slender fescue – Vulpia octoflora var. hirtella – CNPS A2
Slender fescue is an annual herb found in sandy to rocky soils in open sites. Its range includes
California, especially the southern California Floristic Province (Hickman 1993). Although
chaparral habitat potentially suitable for this taxon is present in the site’s development area on
north slopes of the ridge south of Horse Valley, slender fescue is not expected to occur on site
because surveys during its April-June blooming period did not find it.
D.
Summary
Most of the special status plant species reviewed have not been detected by past surveys, were
not detected during the recent focused surveys, and therefore are not expected to occur within the
development area. However, a small number of species were found on Roddy Ranch in Horse
Valley within the development area and in several others in Deer Valley outside of the
development area. All of these species, with the exception of big tarplant, are CNPS plants that
only have some degree of local or regional scarcity.
Both past and current surveys have resulted in positive identification of big tarplant
(Blepharizonia plumose; CNPS 1B) in Horse Valley within the development area. During
September Sycamore’s 1998 botanical surveys, 12 distinct populations of big tarplant were
identified on the entire Roddy Ranch property including both the development area and Deer
Valley, ranging in size from as many as 3,637 individuals to as few as seven plants. Sycamore
estimated that over 10,000 individuals of big tarplant occur on the entire Roddy Ranch. Current
surveys found eight distinct populations of big tarplant in Horse Valley and Zentner and Zentner
estimated approximately 2,100 individuals within the development area.
A total of seven other species that CNPS lists as having some degree of local or regional scarcity
have also been observed within the development area of Horse Valley.
One occurrence of adobe navarretia (Navarretia nigelliformis ssp. nigelliformia; proposed CNPS
List 4 species) was documented in Horse Valley by Sycamore Associates in 1998. This species
was not seen during any recent surveys or the 2006 vegetation surveys by Zentner and Zentner
during its blooming period; and is evidently since been extirpated from the site due to
disturbance.
47
Silverscale (Atriplex argentea var. mohavensis; CNPS A2) and Sharp-toothed pepper-grass
(Lepidium dictyotum var. acutidens; CNPS A2) were commonly observed during the 2006
surveys by Zentner and Zentner in the alkaline prairie habitat in the northeastern part of the
development area along Empire Mine Road. This species is also common in the alkaline habitat
at the end of Deer Valley.
Two small populations of small-flowered morning glory (Convolvulus simulans; CNPS *A1,
CNPS List 4) were found by Zentner and Zentner in 2006 on disked ground near the large stock
pond closest to the golf course entrance; one was west of the pond, the other south of it (between
the pond and the road).
During Zentner and Zentner’s 2006 surveys, Hansen’s larkspur (Delphinium hansenii; CNPS
A1) was commonly observed in the development area in woodland habitat on the north slope of
the ridge south of Horse Valley.
Cupped downingia (Downingia insignis; CNPS A2) and pillwort (Pilularia Americana; CNPS
A2) were commonly observed during the Zentner and Zentner 2006 surveys within the beds of
the seasonal ponds located at the eastern end of the site’s development area along Deer Valley
Road.
A total of four other special status species plants have been observed in Deer Valley, which will
not be developed, as a result of previous survey work within Roddy Ranch. Deer Valley is well
outside of the development area, which will take place within Horse Valley to the north.
Sycamore Associates found one population of heartscale (Atriplex cordulata; CNPS 1B) totaling
20 individuals, located in Deer Valley during their 1998 surveys. Heartscale was observed in a
sparsely vegetated alkali scald area immediately adjacent to the intersection of Deer Valley and
Chadbourne Roads. Heartscale has not been observed in Horse Valley and was not seen within
the development area or in Horse Valley during Zentner and Zentner’s 2006 surveys.
In 1998 Sycamore Associates identified 11 populations of serpentine bedstraw (Galium
andrewsii ssp. gatense; CNPS 4) within blue oak woodland on the north-facing slopes in Deer
Valley. It was not seen in Horse Valley during focused surveys during its flowering period and
therefore it is not expected to occur within the development site.
During their 1998 surveys, Sycamore Associates identified 13 populations (totaling
approximately 172 individuals) of Diablo helianthella (Helianthella castanea; CNPS 1B) within
Deer Valley. 2. This species is restricted entirely to north-facing slopes along the ridge to the
south of Deer Valley and well outside of the development area. Diablo helianthella was not
observed in the development site during focused surveys during its blooming period in 2006 and
is not expected to be found in the development site.
There is one CNDDB occurrence record of round-leaved filaree (Erodium macrophyllum; CNPS
2) this species within the Roddy Ranch site in 1994; this was found in the central portion of Deer
Valley, outside of the development area.
48
Legend
............. Assessment Area
-
Project Name: Roddy Ranch
Project Number. 859 CSC
Source: Topo! Map based on
USGS 7.5 min
Quad: Antioch S. CA
Date: 11/01/05
C:/859csc/fig1Iocation.dwg
..........
0 2 4
Scale: 1 inch=2 miles
FIGURE 1
Location Map
Roddy ranch Project
Antioch, CA
Roddy Ranch Boundary
95 Unden Street, Suite 6
I EIT' EI •
~~
94607
I EI TIE I 510.622.8110
• • II
Project Name:
Project Number:
Project File:
Roddy Ranch
859 CSC
C:lproJeclsl800-899\859csc\vegelallonI20072.dwg
Date:
Topo Source:
5/03/06
Carlson, Barbee & Gibson
o
Scale: 1 Inch = 1100 Feet
1100
~
m
Project North
ZEN TNEI~
•• JIENTNEI
Land P/anninJl- and Restoration
95 Linden Street., Suile 6, Oakland, CA 94607
Phone: (510) 62/-8110 fax: (510) 622-8116
FIGURE 2
Habitat Map
Roddy Ranch
Antioch, CA
Legend
~
AII<ali Meadow
Blue Oak Woodland
1
I
J
•----­
··.···.
Gill
..
..
·······
.....
..
----­
2200
Diablo Sage Scrub /
Chamise Chaparral
Drainage Channel
Non-Native Grassland
Seasonal Wetland
Stockpond
Assessment Area Boundary
Roddy Ranch Boundary
m
1
]
Project Name:
Project Number:
Project File:
Project North
Date:
1
Map Source:
Roddy Ranch
859 esc
C:lprcJeclsI80D-8991859cscloceurrenceplantsOB07.dwg
8/03/07
USGS 7.5 MIN
I
Quads: Antioch N & 5, Byron Hotsprings, Brentwood, Clayton,
Diablo, Honker Bay, Tassajara, CA
...
FIGURE 3
ZEN , NEI . . VegetationOccurrence Map
, NEI Special Status Sp~cies
I
EN
• • J
Observed On-site
Legend
Land Planning and Res/oration
Roddy Ranch Project Site
95 Linden street, Suite 6, Oakland, CA 94607
Phone: (510) 622-8110 Fox (510) 622-8116
Antioch, CA
CNDDB Data
•
Big tarplant Occurrence Site
Blepharizonia plumosa
•
Round-leaved filaree Occurrence Site
Erodium macrophyllum
•
Diablo helianthella Occurrence Site
Helianthella castanea
Zentner & Zentner Data
1'1
Silverscale Occurrence Site
Atriplex argentea var. mohavensis
& Sharp-toothed pepper grass Occurrence Site
Lepidium dictyotum var. acutidens
•
Small-flowered Morning-glory Occurrence Site
CQnvolvulus simulans
•
H~nsen's Delphinium Occurrence Site
D~/phinium hansenii
o
Cupped Downingia Occurrence Site
Downingia insignis
& American pillwort Occurrence Site
Pilularia americana
See Figure 5 for Zentner&Zentner Big Tarplant Observations
Sycamore Associates Data
Heartscale Occurrence Site
Atriplex cordulata
Big tarplant Occurrence Site
Blepharizonia plumosa spp. plumosa
Serpentine bedstraw Occurrence Site
Galium andrewsii ssp. gatense
DiablO sunflower Occurrence Site
Helianthella castanea
'*
*
*
J
J
o
7000
14000
~
1I
Scale: 1 inch
158 CNDDB Occurrence Number
Assessment Area
-
Roddv Ranch Proiect Boundary
*
Adobe navarettia Occurrence Site
Navarettia niaelliformis sSP.niaelliformis
tJ
. i ;~i' i
m
Project Name:
Roddy' Ranch
Project Number:
859 esc
Project File:
Project North
1
C:lproJeclsIBOO·B99IB59cscloccurrenceplants20B07.dwg
Date:
8/03/07
Map Source:
USGS 7.5 MIN
Quads: Antioch N & S, Byron Hotsprings, Brentwood, Clayton,
Diablo, Honker Bay, Tassajara, CA
lEN TNEI~
Vegetation Occurrence Map
Special Status Species
Not Found On-site
Land Planning and Restoration
Roddy Ranch Project Site
95 linden Street., Suite 6, Oakland, CA 94607
Antioch, CA
'.}
t':
•• JIENTNEI
'i~~!~~(\;" ;
'j.,!
lI
Phone: (510) 622-8110
Legend
(
\
\1
o
1
•
•
•o
•
•
•.,
•
•
•
•
•
•
•o
(/)
7000
14000
jI~
Scale: 1 inch 7000 Feet
=
-
Assessment Area
Roddy Ranch Project Boundary
fax: (,Jl0) 622-8116
-----------:--~
'4-,:
CNDDB Data
(l)
(/)
•.
j I 0
FIGURE 4
158
La~ge-flowered
fiddleneck Occurrence Site
Amsinckia grandiflora
Mt., Diablo manzanita Occurrence Site
Arctostaphylos auriculata
Contra Costa manzanita Occurrence Site
Arctostaphylos manzanita ssp. laevigata
Brittlescale Occurrence Site
Atriplex depressa
San Joaquin spearscale Occurrence Site
Atriplex joaquiniana
Mt. Diablo fairy-lantern Occurrence Site
Calochortus pulchellus
Butte County morning-glory Occurrence Site
Calystegia atriplicifolia ssp. buttensis
Chaparral harebell Occurrence Site
Campanula exigua
Mt. Diablo buckwheat Occurrence Site
Eriogonum truncatum
Diamond-petaled California poppy Occurrence Site
Eschscholzia rhombipetala
Antioch Dunes evening-primrose Occurrence Site
Oenothera deltoides ssp. howellii
,
Rock sanicle Occurrence Site
Sanicula saxatilis
Brewer's western flax Occurrence Site
Hesperolinon breweri
Contra Costa goldfields Occurrence Site
Lasthenia conjugens
Showy madia Occurrence Site
Madia radiata
Mt. Oiablo phacelia Occurrence Site
Pha'celia phacelioides
Rayless ragwort Occurrence Site
Sen,ecio aphanactis
Most beautiful jewel-flower Occurrence Site
Streptanthus albidus ssp. peramoenus
Mt. Diablo jewel-flower Occurrence Site
Streptanthus hispidus
Coastal triquetrella Occurrence Site
TrlqtJetrella californica
CNDDB Occurrence Number
1
Project Name:
Project Number:
1
Project File:
1
Roddy Ranch
859 CSC
C:lprojecls\8Q0.899\8SBcscltarplllnt populatlons.dwg
Date:
10/25/06
Topo Source:
Carlson, Barbee & Gibson
o
1I
S-c-a-Ie-:1-I-nc-h-=-11-0-0F-e-et
1100
2200
~
\
m
1
I
1
Project North
)
ZE• , • EI~
•• tllE.T.EI
Land Planning and Restoration
95 Linden Streel., Suile 6, Oakland, CA 94607
Phone: (510) 622-8110 Fax (510) 622-8116
FIGURE 5
Big Tarplant
Populations Map
Roddy Ranch
Antioch, CA
Legend
III
Big tarplant (Blepharizomia plumosa
spp. plumosa) Populations
1
(
1
I
111
---
Ii
I
LITERATURE CITED
Aplin, J. A. 1967. Biological survey of San Francisco Bay, 1963-1966. California Department of
Fish and Game, Mar. Resour. Oper., MRO Ref. 67-4. 131 pp.
Brown, N. L. and E. A. Cypher, 1986. Endangered Species Recovery Program profile.
CDFG. 1998. Special plants list: April 1998. California Department of Fish and Game Natural
Diversity Data Base: Sacramento.
CDFG. 2000. 1999 Annual report on the status of California’s state listed threatened and
endangered plants and animals. California Department of Fish and Game, Sacramento,
California.
California Department of Fish and Game (CDFG), 2000. The Status of Rare, Threatened, and
Endangered Animals and Plants of California, Large-flowered fiddleneck.
California Department of Fish and Game (CDFG). 2003. California Natural Diversity Data Base
(CNDDB). Sacramento, California.
CDFG. 2007. Natural Diversity Database, Natural Heritage Division. Sacramento.
California Native Plant Society (CNPS). 2001. Inventory of Rare and Endangered Plants of
California (sixth edition). Rare Plant Scientific Advisory Committee, David P. Tibor, Convening
Editor. Sacramento, CA.
California Native Plant Society (CNPS). 2003. Electronic Inventory of Rare and Endangered
Plants of California. Sacramento, California.
California Native Plant Society (CNPS). 2007. Electronic Inventory of Rare and Endangered
Plants of California. Sacramento, California.
California Natural Diversity Database (CNDDB). 2001. RareFind 2, Version 2.1.2 (September 5,
2001 update). California Department of Fish and Game, Sacramento, CA.
Goals Project 2000. Baylands Ecosystem Species and Community Profiles: Life histories and
environmental requirements of key plants, fish, and wildlife. Prepared by the San Francisco Bay
Area Wetland Ecosystem Goals Project. P.R. Olofson, editor. San Francisco Bay Regional Water
Quality Control Board, Oakland, Calif.
Hickman, J. C. (ed.). 1993. The Jepson Manual, Higher Plants of California. University of
California Press, Berkeley, CA.
Keeler-Wolf, T., D. R. Elam, K. Lewis, and S. A. Flint. 1998. California Vernal Pool
Assessment – Preliminary Report. Department of Fish and Game, 1807 13th Street, Suite 202,
Sacramento, California, 95814, USA
50
Liston, A. 1992. Isozyme systematics of Astragalus sect. Leptocarpi subsect. Californici
(Fabaceae). Systematic Botany 17:367-379.
Munz, P.A. 1959. A California Flora. University of California Press, Berkeley and Los
Angeles
NRCS, 1995. Hydric soils of California. Natural Resource Conservation Service (NRCS),
USDA
Ray, P. M. and H. F. Chisaki. 1957. Studies on Amsinckia. American Journal of Botany
44:529–544.
Sawyer, J. O., and T. Keeler-Wolf. 1995. A manual of California vegetation. California Native
Plant Society, Sacramento, California. 471 pages.
SCS, 1978, Soils Survey of Napa County, California. Soil Conservation Service (SCS), USDA
Skinner, Mark W. and Bruce M. Pavilik. 1994. California Native Plant Society’s inventory of
rare and endangered vascular plants of California, fifth edition. California Native Plant Society,
Sacramento.
Sycamore Associates LCC. 1998. Botanical Assessment of the Roddy Ranch: Contra Costa
County. Sycamore Associates, Lafayette, California.
U.S. Fish and Wildlife Service (USFWS). 1997.
grandiflora) Recovery Plan, Portland, Oregon.
Large-flowered Fiddleneck (Amsinckia
U.S. Fish & Wildlife Service (USFWS), 1998. Recovery plan for upland species of the San
Joaquin Valley, California. Region 1, Portland, Oregon.
USFWS. 2003. Endangered and Threatened Wildlife and Plants; Final Designation of Critical
Habitat for Four Vernal Pool Crustaceans and Eleven Vernal Pool Plants in California and
Southern Oregon Vernal pool crustaceans and plants in California and Oregon. Portland, Oregon.
Witham, C. W. 1998. Electronic mail to Ellen Cypher, Endangered Species Recovery Program,
Bakersfield, California. 1 page.
51
APPENDIX A
List of Plants Observed On-Site
PLANTS RECORDED AT HORSE VALLEY, RODDY RANCH
DURING 2006 SURVEYS
AMARANTHACEAE
Amaranthus albus
Amaranthus retroflexus (2007)
ANACARDIACEAE
Toxicodendron diversilobum *
APIACEAE
Daucus pusillus
Eryngium aristulatum *
Sanicula bipinnatifida *
Torilis nodosa
ASCLEPIADACEAE
Asclepias fascicularis *
ASTERACEAE
Achyrachaena mollis
Acroptilon repens
Anthemis cotula
Artemisia californica *
Aster subulatus var. ligulatus * (2007)
Baccharis pilularis *
Blennosperma nanum var. nanum *
Blepharizonia plumosa ssp. plumose *
Carduus pycnocephalus
Centaurea melitensis
Centaurea solstitialis
Chamomilla suaveolens
Cirsium vulgare
Conyza Canadensis *
Conyza floribunda?
Cotula coronopifolia
Cynara cardunculus
Dittrichia graveolens
Euthamia occidentalis
Filago gallica *
Gnaphalium luteo-album
Gnaphalium palustre *
Grindelia camporum var. camporum *
Hemizonia kelloggii *
Hesperevax sparsiflora var. sparsiflora * (2007)
Holocarpha virgata ssp. virgata *
Hypochaeris glabra
Lactuca biennis
Lactuca serriola
Micropus californicus var. californicus * (2007)
Microseris douglasii ssp. douglasii *
Picris echioides
Silybum marianum
Sonchus asper (2007)
Sonchus oleraceus
Wyethia glabra *
Xanthium spinosum
Xanthium strumarium
BORAGINACEAE
Amsinckia menziesii var. intermedia * (2007)
Plagiobothrys stipitatus var. micranthus *
BRASSICACEAE
Capsella bursa-pastoris (2007)
Hirschfeldia incana
Lepidium dictyotum var. acutidens *
Lepidium latifolium
Lepidium latipes var. latipes * (2007)
Lepidium nitidum
Raphanus raphanistrum
Raphanus sativus
Sinapis arvensis
Sisymbrium officinale
CAMPANULACEAE
Downingia insignis *
CARYOPHYLLACEAE
Cerastium glomeratum (2007)
Silene gallica
Spergula arvensis
Spergularia marina
Spergularia rubra
CHENOPODIACEAE
Atriplex argentea var. mohavensis *
Atriplex rosea
Salsola tragus
CONVOLVULACEAE
Convolvulus arvensis
Convolvulus simulans * (2007)
Cressa truxillensis *
2
CRASSULACEAE
Crassula connata * (2007)
CUCURBITACEAE
Marah fabaceus
ERICACEAE
Arctostaphylos manzanita ssp. manzanita *
EUPHORBIACEAE
Chamaesyce serpens *
Eremocarpus setigerus
FABACEAE
Lotus corniculatus
Lotus purshianus *
Lupinus bicolor *
Lupinus microcarpus var. densiflorus * (2007)
Lupinus succulentus *
Medicago polymorpha
Melilotus indica
Trifolium depauperatum var. amplectens *
Trifolium dubium
Trifolium fragiferum *
Trifolium hirtum
Trifolium microcephalum *
Trifolium variegatum *
Trifolium willdenovii *
Vicia sativa
Vicia villosa
FAGACEAE
Quercus douglasii *
Quercus lobata *
Quercus wislizenii *
FRANKENIACEAE
Frankenia salina *
GERANIACEAE
Erodium botrys
Erodium cicutarium
Erodium moschatum (2007)
Geranium dissectum
Geranium molle (2007)
HIPPOCASTANACEAE
Aesculus californica *
3
HYDROPHYLLACEAE
Phacelia ciliata *
LAMIACEAE
Trichostema lanceolatum
LYTHRACEAE
Lythrum hyssopifolium
MALVACEAE
Malva nicaeensis (2007)
Malvella leprosa
MORACEAE
Maclura pomifera
MYRTACEAE
Eucalyptus globulus
OLEACEAE
Olea europaea
ONAGRACEAE
Clarkia affinis * (2007)
Clarkia purpurea ssp. quadrivulnera *
Epilobium brachycarpum *
Epilobium ciliatum
PAPAVERACEAE
Eschscholzia californica *
PLANTAGINACEAE
Plantago erecta * (2007)
POLEMONIACEAE
Navarretia mellita *
Navarretia pubescens *
POLYGONACEAE
Polygonum arenastrum
Polygonum lapathifolium * (2007)
Rumex crispus
Rumex obtusifolius
Rumex pulcher
PORTULACACEAE
Calandrinia ciliata * (2007)
4
PRIMULACEAE
Anagallis arvensis
RANUNCULACEAE
Delphinium hansenii ssp. hansenii *
Ranunculus sceleratus * (2007)
RHAMNACEAE
Rhamnus ilicifolia *
ROSACEAE
Adenostoma fasciculatum *
Heteromeles arbutifolia *
Prunus dulcis
RUBIACEAE
Galium parisiense
Sherardia arvensis
RUTACEAE
Ptelea crenulata
SALICACEAE
Populus fremontii *
Salix babylonica
Salix exigua *
Salix gooddingii *
Salix laevigata *
Salix lasiolepis * (2007)
SAXIFRAGACEAE
Lithophragma heterophyllum * (2007)
SCROPHULARIACEAE
Bellardia trixago
Castilleja attenuata * (2007)
Castilleja exserta ssp. exserta *
VISCACEAE
Phoradendron villosum
CYPERACEAE
Cyperus eragrostis *
Eleocharis macrostachya *
Scirpus maritimus *
5
JUNCACEAE
Juncus bufonius *
JUNCAGINACEAE
Lilaea scilloides *
LILIACEAE
Asparagus officinalis
Brodiaea elegans *
Calochortus venustus *
Chlorogalum pomeridianum * (2007)
Dichelostemma capitatum * (2007)
Triteleia laxa *
POACEAE
Aira caryophyllea
Avena barbata
Avena fatua
Avena sativa
Brachypodium distachyon
Bromus catharticus
Bromus diandrus
Bromus hordeaceus
Bromus laevipes *
Bromus madritensis ssp. madritensis
Bromus madritensis ssp. rubens (2007)
Bromus stamineus
Crypsis schoenoides *
Cynodon dactylon
Distichlis spicata *
Echinochloa crus-galli
Festuca arundinacea
Festuca rubra *
Gastridium ventricosum
Glyceria declinata *
Hordeum brachyantherum *
Hordeum marinum
Hordeum murinum
Hordeum vulgare
Leymus triticoides *
Lolium multiflorum
Nassella pulchra *
Paspalum dilatatum
Phalaris aquatica
Phalaris paradoxa
Poa annua (2007)
Poa secunda *
Polypogon monspeliensis
6
Taeniatherum caput-medusae
Vulpia myuros
Vulpia microstachys *
TYPHACEAE
Typha angustifolia *
POTAMOGETONACEAE
Potamogeton pectinatus *
PINACEAE
Pinus sabiniana *
MARSILEACEAE
Pilularia americana
PTERIDACEAE
Pentagramma triangularis
* = Native
(2007) = seen during 2007 faunal surveys
7
APPENDIX B
Federal and State Species List
8
California Department of Fish and Game
Natural Diversity Database
Selected Elements by Scientific Name - Portrait
Roddy Ranch Special Satus Species
Antioch North, Antioch South, Brentwood, Byron Hot Springs, Clayton, Diablo, Honker Bay and Tassajara quads
Scientific Name/Common Name
Element Code
Federal Status
State Status
GRank
SRank
1 Age/aius tricolor
tricolored blackbird
ABPBXB0020
G2G3
S2
2 Alkali Meadow
CTI45310CA
G3
S2.1
3 Alkali Seep
CTI45320CA
G3
S2.1
4 Ambystoma californiense
California tiger salamander
AAAAA01180
Threatened
G2G3
S2S3
5 Amsinckia grandif/ora
large-flowered fiddleneck
PDBOR01050
Endangered
G1
S1.1
6 Andrena blennospermatis
IIHYM35030
G2
S2
G3G4T3T4
S3
Endangered
CDFG or
CNPS
SC
SC
1B.1
A vernal pool andrenid bee
7 Annie//a pulchra pulchra
ARACC01012
silvery legless lizard
8 Anomobryum julaceum
SC
Q
NBMUS80010
G4
S1.3
IICOL49020
G1
S1
AMACC10010
G5
S3
G5T1
S1
22
slender silver-moss
9 Anthicus antiochensis
Antioch Dunes anthicid beetle
10 Antrozous pa//idus
SC
pallid bat
11 Apodemia mormo langei
Lange's metalmark butterfly
IILEPH7012
12 Aquila chrysaetos
golden eagle
ABNKC22010
G5
S3
SC
13 Archop/ites interruptus
Sacramento perch
AFCQB07010
G3
S1
SC
14 Arctostaphylos auriculata
PDERI04040
G2
S2.2
1B.3
PDERI04273
G5T2
S2
18.2
16 Asio f/ammeus
short-eared owl
ABNSB13040
G5
S3
17 Aster I en tus
PDASTOT540
G2
S2.2
1B.2
PDFABOF8R1
G1T1
S1.1
1B.2
ABNSB10010
G4
82
PDCHE042LO
G2Q
82.2
1B.2
PDCHE041F3
G2
82.1
1B.2
PDA8T1C011
G1
81.1
1B.1
G1
81
Endangered
Mt. Diablo manzanita
15 Arctostaphylos manzanita ssp. laevigata
Contra Costa manzanita
SC
Suisun Marsh aster
18 Astragalus tener var. tener
alkali milk-vetch
19 Athene cunicularia
8C
burrowing owl
20 Atriplex depress a
brittlescale
21 Atriplexjoaquiniana
San Joaquin spearscale
22 Blepharizonia plumosa
big tarplant
23 Branchinecta longiantenna
ICBRA03020
Endangered
longhorn fairy shrimp
Commercial Version -­ Dated June 02, 2007 -- Biogeographic Data Branch
Report Printed on Friday, August 03, 2007
Page 1
Information Expires 12/02/2007
California Department of Fish and Game
Natural Diversity Database
Selected Elements by Scientific Name - Portrait
Roddy Ranch Special Satus Species
Antioch North, Antioch South, Brentwood, Byron Hot Springs, Clayton, Diablo, Honker Bay and Tassajara quads
Scientific Name/Common Name
~
Element Code
Federal Status
State Status
Threatened
GRank
SRank
G3
8283
G2
82
G5
S2
G3
83.1
G4T1
81
CDFG or
CNPS
24 Branchinecta Iynchi
vernal pool fairy shrimp
ICBRA03030
25 Branchinecta mesovallensis
midvalley fairy shrimp
ICBRA03150
26 Buteo swainsoni
8wainson's hawk
ABNKC19070
27 California macrophyllum
round-leaved filaree
PDGER01070
28 Callophrys mossii bayensis
8an Bruno elfin butterfly
IILEPE2202
29 Calochortus pulchellus
Mt Diablo fairy-lantern
PMLlLOD160
G2
82.1
1B.2
30 Calystegia atriplicifolia ssp. buttensis
Butte County morning-glory
PDCON04012
G5T3
83.2
1B.2
31 Campanula exigua
chaparral harebell
PDCAM020AO
G2
82.2
1B.2
32 Centromadia parryi ssp. congdonii
Congdon's tarplant
PDA8T4ROP1
G4T3
83.2
1B.2
33 Circus cyaneus
northern harrier
ABNKC11010
G5
83
34 Cismontane Alkali Marsh
CTT52310CA
G1
81.1
35 Coastal Brackish Marsh
CTT52200CA
G2
82.1
36 Coelus gracilis
8an Joaquin dune beetle
IICOL4A020
G1
81
37 Cordylanthus mollis ssp. mollis
soft bird's-beak
PD8CROJOD2
Rare
G2T1
81.1
1B.2
38 Cordylanthus nidularius
Mt Diablo bird's-beak
PD8CROJOFO
Rare
G1
81.2
1B.1
39 Cryptantha hooveri
Hoover's cryptantha
PDBOROA190
GH
8H
1A
40 Delphinium californicum ssp. interius
Hospital Canyon larkspur
PDRANOBOA2
G3T2?
82?
1B.2
41 Delphinium recurvatum
recurved larkspur
PDRANOB1JO
G2
82.2
1B.2
42 Didymodon norrisii
Norris' beard-moss
NBMU82COHO
G2G3
82.2
2.2
43 Dipodomys heermanni berkeleyensis
Berkeley kangaroo rat
AMAFD03061
G3G4T1
81
44 Downingia pusilla
dwarf downingia
PDCAM060CO
G3
83.1
45 Efferia antiochi
IIDIP07010
G1G3
8183
ABNKC06010
G5
83
Threatened
Endangered
Endangered
1B.1
8C
2.2
Antioch efferian robberfly
46 Elanusleucurus
white-tailed kite
Commercial Version -- Dated June 02, 2007 -- Biogeographic Data Branch
Report Printed on Friday, August 03, 2007
Page 2
Information Expires 12/0212007
California Department of Fish and Game
Natural Diversity Database
Selected Elements by Scientific Name - Portrait
Roddy Ranch Special Satus Species
Antioch North, Antioch South, Brentwood, Byron Hot Springs, Clayton, Diablo, Honker Bay and Tassajara quads
Scientific Name/Common Name
Element Code
Federal Status
State Status
GRank
SRank
CDFG or
CNPS
47 Emys (=Clemmys) marmorata
western pond turtle
ARAAD02030
G3G4
S3
SC
48 Eremophila alpestris actia
California horned lark
ABPAT02011
G5T3
S3
SC
49 Eriastrum brandegeeae
Brandegee's eriastrum
PDPLM03020
G3
S3.2
1B.2
50 Eriogonum truncatum
Mt. Diablo buckwheat
PDPGN085Z0
G1
51.1
1B.1
51 Erysimum capitatum ssp. angustatum
Contra Costa wallflower
PDBRA16052
G5T1
S1.1
1B.1
52 Eschscholzia rhombipetala
diamond-petaled California poppy
PDPAPOAODO
G1
S1.1
18.1
53 Eucerceris ruficeps
redheaded sphecid wasp
IIHYM18010
G1G3
S1S2
54 Falco mexicanus
prairie falcon
ABNKD06090
G5
S3
55 Friti/laria liIiacea
fragrant fritillary
PMLlLOVOCO
G2
S2.2
56 Geothlypis trichas sinuosa
saltmarsh common yellowthroat
ABPBX1201A
G5T2
S2
57 Helianthe/la castanea
Diablo helianthella
PDAST4M020
G3
S3.2
58 Helminthoglypta nickliniana bridgesi
Bridges' coast range shoulderband (snail)
IMGASC2362
G2T1
S1
59 Hesperolinon breweri
Brewer's western flax
PDLlN01030
G2
S2.2
60 Hygrotus curvipes
curved-foot hygrotus diving beetle
IICOL38030
G1
S1
61 Hypomesus transpacificus
Delta smelt
AFCHB01040
G1
S1
62 Idiostatus middlekauffi
Middlekauff's shieldback katydid
1I0RT31010
G1G2
S1
63 Isocoma arguta
Carquinez goldenbush
PDAST57050
G1
S1.1
64 Lanius ludovicianus
loggerhead shrike
ABPBR01030
G4
S4
65 Lasthenia conjugens
Contra Costa goldfields
PDAST5L040
G1
S1.1
66 Latera/lus jamaicensis coturniculus
California black rail
ABNME03041
G4T1
S1
67 Lathyrusjepsonii var.jepsonii
Delta tule pea
PDFAB250D2
G5T2
S2.2
68 Lepidurus packardi
vernal pool tadpole shrimp
ICBRA10010
G3
S2S3
Commercial Version -- Dated June 02, 2007 -- Biogeographic Data Branch
Report Printed on Friday, August 03, 2007
Endangered
Threatened
Endangered
Threatened
Endangered
Threatened
Endangered
SC
1B.2
SC
1B.2
1B.2
1B.1
SC
1B.1
1B.2
Page 3
Information Expires 12102/2007
California Department of Fish and Game
Natural Diversity Database
Selected Elements by Scientific Name - Portrait
Roddy Ranch Special Satus Species
Antioch North, Antioch South, Brentwood, Byron Hot Springs, Clayton, Diablo, Honker Bay and Tassajara quads
Scientific Name/Common Name
Element Code
Federal Status
State Status
GRank
SRank
CDFG or
CNPS
Rare
G3
53.1
1B.1
2.1
59 Lilaeopsis masonii
Mason's Iilaeopsis
PDAPI19030
70 Limosella subulata
Delta mudwort
PD5CR10050
G4?Q
52.1
71 Linderiella occidentalis
California linderiella
ICBRA05010
G3
5253
72 Lytta mo/esta
molestan blister beetle
IICOL4C030
G2
52
73 Madia radiata
showy madia
PDA5T550EO
G2
52.1
1B.1
74 Malacothamnus hal/ii
Hall's bush mallow
PDMALOQOFO
G1Q
51.2
1B.2
75 Masticophis flagellum ruddocki
5an Joaquin whipsnake
ARADB21021
G5T2T3
52?
75 Masticophis lateralis euryxanthus
Alameda whipsnake
ARADB21031
G4T2
52
77 Me/ospiza me/odia maxillaris
5uisun song sparrow
ABPBXA301K
G5T2
52
78 Metapogon hurdi
Hurd's metapogon robberfly
IIDIP08010
G1G3
5153
79 Myrmosula pacifica
Antioch multilid wasp
IIHYM15010
GH
5H
80 Northern Claypan Vernal Pool
CTT44120CA
G1
51.1
81 Oenothera deltoides ssp. howel/ii
Antioch "Dunes evening-primrose
PDONAOCOB4
G5T1
51.1
82 Perdita scitula antiochensis
Antioch andrenid bee
IIHYM01031
G1T1
51
83 Perognathus inornatus inornatus
5an Joaquin pocket mouse
AMAFD01051
G4T2T3
5253
84 Phacelia phacelioides
Mt. Diablo phacelia
PDHYDOC3QO
G1
51.2
85 Phalacrocorax auritus
double-crested cormorant
ABNFD01020
G5
53
85 Philanthus nasalis
Antioch specid wasp
IIHYM20010
G1
51
87 Phrynosoma coronatum (frontale population)
Coast (California) horned lizard
ARACF12022
G4G5
5354
88 Rallus longirostris obso/etus
California clapper rail
ABNME05015
Endangered
G5T1
51
89 Rana aurora draytonii
California red-legged frog
AAABH01022
Threatened
G4T2T3
5253
90 Reithrodontomys raviventris
salt-marsh harvest mouse
AMAFF02040
Endangered
Endangered
G1G2
5152
91 Sanicula saxatilis
rock sa nicle
PDAPl1Z0HO
Rare
G2
52.2
Commercial Version -- Dated June 02, 2007 "- Biogeographic Data Branch
Report Printed on Friday, August 03, 2007
Threatened
Endangered
Threatened
Endangered
Endangered
5C
5C
1B.1
1B.2
5C
5C
5C
1B.2
Page4
Information Expires 12/02/2007
California Department of Fish and Game
Natural Diversity Database
Selected Elements by Scientific Name - Portrait
Roddy Ranch Special Satus Species
Antioch North, Antioch South, Brentwood, Byron Hot Springs, Clayton, Diablo, Honker Bay and Tassajara quads
Scientific NamelCommon Name
Element Code
Federal Status
State Status
GRank
SRank
CDFG or
. CNPS
92 Senecio aphanactis
rayless ragwort
PDA5T8H060
G3?
51.2
93 Serpentine Bunchgrass
CTT42130CA
G2
52.2
94 Sphecodogastra antiochensis
Antioch Dunes halcitid bee
IIHYM78010
G1
51
95 Stabilized Interior Dunes
CTT23100CA
G1
51.1
96 Sterna antillarum browni
California least tern
ABNNM08103
G4T2T3Q
5253
97 Streptanthus albidus ssp. peramoenus
most beautiful jewel-flower
PDBRA2G012
G2T2
52.2
1B.2
98 Streptanthus hispidus
Mt. Diablo jewel-flower
POBRA2GOMO
G1
51.2
1B.3
99 Taxidea taxus
American badger
AMAJF04010
G5
54
100 Thamnophis gigas
giant garter snake
ARADB36150
G2G3
5253
101 Triquetrella californica
coastal triquetreUa
NBMU575010
G1
51.2
1B.2
102 Tropidocarpum capparideum
caper-fruited tropidocarpum
PDBRA2R010
G1
51.1
1B.1
103 Valley Needlegrass Grassland
CTT42110CA
G1
53.1
104 Valley Sink Scrub
CTT3621 DCA
G1
51.1
105 Viburnum elfipticum
oval-leaved viburnum
PDCPR07080
G5
52.3
106 Vulpes macrotis mutica
5an Joaquin kit fox
AMAJA03041
G4T2T3
5253
Commercial Version -- Dated June 02, 2007 -- Biogeographic Data Branch
Report Printed on Friday, August 03, 2007
Endangered
Threatened
Endangered
Endangered
Threatened
Threatened
2.2
5C
2.3
Page 5
Information Expires 12/02/2007
*,.c ,"', ,
APPENDIX 1: CEQA-Protected Rare and Unusual Plants
of The Dbk and Vml Regions
(Covering the Black Diamond/South Antioch and Lone Tree VaHey-to-Marsh Creek Areas)
2006
(Statewide Rare Plants in Upper Case)
. Rank
in East
Bav
A2
Alx
Al
Al
Alx
*AI
Alx
*A2
A2
*A2
Al
Al
AI?
A2
*A2
*A2
S
-
-
-~-
Allenrolfea occidentalis
Allium peninsulare vaL peninsulare
(historical-l 954)
Allophyllum gilioides ssp. violaceum
(ssp. 1!;ilioides is more common)
Amaranthus DOwellii
Amsinckia douglasiana (historical­
1938)
AMSINCKIA GRANDlFLORA
Amsinckia tessellata var. gloriosa
(historical-1954)
ARCTOSTAPHYLOS
AURICULATA
Arctostaphylos glandulosa ssp.
glandulosa
ARCTOSTAPHYLOS
MANZANITA SSP. LAEVIGATA
Argemone munita
Astragalus didymocarpus var.
didymocarpus
(A. ~ambelianus is more common)
Astragalus oxyphysus(?)
(A. asymmetricus is more common)
. Atriplex argentea var. mohavensis
ATRIPLEXCORONATA VAR.
CORONATA
ATRIPLEX DEPRESSA
c-
N
iodine bush
- -
-- - - - - -
Alkali areas
peninsular onion
Dry Open Slopes; Misc. habitats
straggling gilia
tessellate flddleneck
Grassland; Sand or Sandstone;
Misc. habitats
Misc. habitats
.Dry Open Slopes; Rock, Tallus or
Scree
Grassland; Sand or Sandstone;
Misc. habitats
Sand or Sandstone; Misc. habitats
Mt. Diablo manzanita
Chaparral; Sand or Sandstone
Eastwood manzanita
Chaparral
Contra Costa manzanita
Chaparral; Sand or Sandstone
prickly poppy
two-se.eded milkvetch
Burns; Misc. habitats
Grassland
Diablo locoweed
Grassland; Scrub
silverscale
crownscale
Alkali areas
Alkali areas; Grassland; Vernal
Pools
Alkali areas; Grassland; Misc.
Wetlands
Alkali areas; Grassland; Misc.
Wetlands
Alkali areas; Coastal Bluff
Forest; Grassland; Scrub; Sand or
Sandstone; Woodland
Chaparral; Grassland; Scrub;
Woodland
Powell's amaranth
Douglas' fiddleneck
large-flowered fiddleneck
brittlescale
*A2
ATIUPLEXJOAQU~ANA
San Joaquin saltbush
Al
A2
Atriplex serenana var. serenana
Balsamorhiza deltoidea
bractscale
deltoid balsamroot
A2
Blepharizonia laxa
(E. plumosa ssp viscida in Jepson
Manual)
BLEPHARIZONlA PLUMOSA
CALAND~ BREWER!
CALOCHORTUSPULCHELLUS
Calycadenia multiglandulosa
Camissonia campestris ssp.
campestris (historical-1940)
Big tarplant
*A2
*A2
*A2
Al
Alx
Habitat
.-.
Big tarplant
Brewer's calandrinia
Mt. Diablo fairy-lantern
stickycalycadenia
Mohave suncup
Grassland; Scrub
Bums; Chaparral; Scrub
Chaparral; Serpentine; Woodland
Rock, Tallus or Scree; Scrub
Grassland; Scrub; Sand or
Sandstone
Roddy Ranch DEIR comments, page 6
~(JfJlIib4f«f{O fh8 presmJafi'01J oflJAD{ornia naliw {Wm
~,v~
\
I
. {"'-
;'UJ
~
>:.,:' i
"
£i~""
.....
A2
Camissonia graciliflora
hill sun cup
A2
Al
Al
small primrose
contorted primrose
yellow pincushion
A2
A2
Camissonia inteimedia
Camissonia strigulosa
Chaenactis glabriuscula var.
megacephala
Charnaesyce ocellata ssp. ocellata
Chorizanthe membranacea
A2
Al
*AI
Clarkia modesta
Collinsia bartsiifolia var. bartsiifolia
CONVOLVULUS SIMULANS
Al
A2
*Alx
Convza coulteri
Croton califoroicus
CRYPTANTIIA HOOVERI
(historical-1908) ,
Crvotantha microstachYs
Cyperus erythrorhizos
Delphinium hansenii
Delphinium parrvi ssp. parryi
Dendromecon rigida
Descurainia pinnata ssP. menziesii
Dicentra chrysantha
A2
A2
Al
Al
A2
Al
A2
'f'( .,".
.-
tv.. . .
-.
Dry Open Slopes; Grassland; Scrub;
Woodland
Burns; Scrub
Grassland; Sand or Sandstone
Dry Open Slopes; Sand or
Sandstone
Sand or Sandstone
Chaparral; Dry Open Slopes;
Grassland; Woodland; Misc.
habitats
Woodlands
Sand or Sandstone
Grassland; Serpentine; Misc.
habitats
Misc. habitats
Sand or Sandstone
Grassland; Sand or Sandstone '
valley spurge
pink spineflower
modest clarkia
white Chinese houses
small-flowered morningglory
Cpulter's CODyza
California croton
Hoover's cryptantha
Teion crvotantha
red-rooted cyperus
Hansen's larkspur
Parry's larkspur
bush poppy
tansy mustard
golden ear-drops
cupped downingia
Solano downingia
Chaparral; Woodland
Riparian
Chaparral; Woodland
Chaparral; Woodland
Burns; Chaparral; Scrub
Chaparral; Rock, Tallus or Scree
Burns; Dry open Slopes; Misc.
habitats
Vernal Pools
Vernal Pools; Misc. Wetlands
squirreltail
cleistogamous boisduvalia
Grassland
Vernal Pools
Abram's eriastrum
many-flowered eriastnun
golden-fleece
angle-stemmed eriogonurn
golden carpet
Dry ()pen Slopes
Chaparral; Forest; Woodland
Chaparral; Forest; Woodland
Sand or Sandstone; Misc. habitats
Gravel; Sand or Sandstone;
Serpentine
Dry Open Slopes; Misc. habitats
Chaparral; Grassland; Sand or
Sandstone; Misc. habitats
Chaparral; Serpentine; Woodland
Grassland; Scrub
Alkali areas; Vernal Pools
Chaparral
Dry Open Slopes; Grassland'
I
A2
Alx.
Al
Al
A2
A2
A2
Downingia insignis
Downingia oroatissima var. eximia
(historical-l 956)
Elymus elymoides ssp. elymoides
Epilobium cleistogarnum (historical­
1907)
Eriastrum abramsii
Eriastrum pluriflorum
Ericameria arborescens
Eriogorium angulosum
Eriogonum luteolum var. luteolum
Al
"AI
Eriogonum nudum var. pubiflorum
ERlOGONUM TRUNCATUM
naked-stemmed buckwheat
Mt. Diablo buckwheat
*A2
*A2
A2
A2
*AI
ERlOPHYLLUM JEPSONII
ERODIUM MACROPHYLLUM
Eryngium vaseyi
Eschscholzia caespitosa
ESCHSCHOLZIA
RHOMBIPETALA
Forestiera pubescens
Fraxinus dipetala
Jepson's woolly sunflower
round-leaved filaree
Vasey's coyote-thistle
tufted poppy
diamond-petaled California
poppy
desert olive
flowering ash
FRITILLARIA AGRESTIS
GALIUM ANDREWSIJ SSP.
GATENSE
stinkbells
serpentine bedstraw
A2
Alx.
A2
A2
*A2
*A1
Riparian
Chaparral; Woodland; Misc.
habitats
Alkali areas; Grassland
Chaparral; Serpentine; Woodland
Roddy Ranch DEIR comments, page 7
(Il (}~i!a.tJto f~p"eJeN!Ifltfan ofCalifornia Imfiw {fora
;Jj'
'..
C:'~!~~lt~c. "~
A2
Al
A2
,Githopsis diffusa ssp. robusta
Glyceria leptostachya
Gnaphalium bicolor
southern bluecup
Davy's manna grass
Bioletti's cudweed
Al
Guillenia flavescens
HELIANTHELLA CASTANEA
Hesperevax acaulis var. ambusticola
,(H. sparsiflof"d is more common)
HESPEREVAX CAULESCENS
(II. sparsiflora is more common)
HESPEROLINON BREWERI
Hesperolinon micranthum
yellow-flowered thelypodium
Diablo helianthella
fire evax
*A2
A2
*A2
*A2
Al
Brewer's western flax
small-flowered dwarf flax
Al
lastarriaea
*AI
LASTHENIA CONJUGENS
Contra Costa goldfields
A2
A2
Alx
Lasthenia minor
woolly goldfields
Layia chrysanthemoides
,smooth layia
tayia glandulosa (historical-l 983 but white layia
ot seen since)
Lepidium dictvotum var. acutidens
sharp-toothed pepper-grass
Lepidium nitidum var. oreganum
shining pepper-grass
(var. nitidum is more common)
Lessingia glandulifera var.
valley lessingia
glandulifera
Lessingia nemaclada
slender-stemmed lessignia
Alx
I
hogwallow starfish
Heterodraba unilateralis
Hutchinsia procumbens
lsoetes howellii '
nJGLANS CALIF'ORNICA VAR.
HINDSII
Juncus bufonius var. occidentalis
(historical-l 895)
(vars. bufonius and congestus are
more common)
Lastarriaea coriacea
Al
A2
A2
*A2
A2
Al
A2
Al
Al
A2
Alx
A2
A2
Al
Al
Al
*Alx
*AI
Alx
Linanthus pygmaeus ssp.
continentalis
Lithophragma bolanderi
Lithophragma cymbalaria (historical­
1895)
Lomatium caruifolium var.
caruifolium
Lotus strigosus
Lupinus affinis
Lupin~s bicolor var. tridentatus
, (var. umbellatus is more common)
Lupinus concinnus
MADIA RADIATA (historical-194I)
MALACOTHAMNUS HALLII
eM. fascicutatus in Jepson Manual)
Malacothrix californica (historical-
Burns; Misc. habitats
Freshwater Marsh; Riparian
DIy Open Slopes; Sand or
Sandstone
Serpentine
Chaparral; Grassland; Woodland
Burns; Dry open Slopes; Misc.
habitats
Vernal Pools
Grassland; Setpentine
Serpentine; Woodland; Misc.
habitats
Grassland
Alkali areas
Misc. Wetlands '
Riparian
heterodraba
prostrate hutchinsia
Howell's Quillwort
Northern California black
walnut
toad rush
Riparian areas; Vernal Pools; Misc.
Wetlands
Chaparral; Gravel; Sand or
Sandstone; Scrub
Alkali areas; Vernal Pools; Misc.
Wetlands
Grassland
Grassland
Sand or Sandstone
Alkali areas
Alkali areas; Vernal Pools; Misc.
habitats
Forest; Sand or Sandstone'
pigmy linanthus
Dry Open Slopes; ROCk, Tallus or
Scree; Woodland; Misc. habitats
Misc. habitats
Bolander starflower
mission star
Misc. habitats
Forest; Riparian; Woodland
caraway-leaved lomatium
strigose trefoil
lupine'
miniature lupine
Grassland; Vernal Pool; Misc.
habitats
Chaparral; Scrub
, Misc. habitats
Misc. habitats
Bajada lupine
showymadia
Hall's bush mallow
Burns; Gravel; Sand ~d Sandstone
, Alkali areas; Grassland
' Chaparral
California malacothrix
GraSsland; Scrub; Sand or
Roddy Ranch DEIR comments, page 8
,~.n,"/;
r - I.r.... Lf- "
' ""." .,r.: '"
,(1"I4£".
~••_ U;
'~1.IMlMIM
WI J''I'Je f'Nr4H1llJ,c(1) 4 vll1J1Jir11ln nA.. ,w liON
.
I
- ,._.
-
:,,_c
.>
"
c..
.
.
AI
AI
1895)
Malacothrix clevelandii
Malacothrix coulteri
Cleveland's malacothrix
snake's-head
A2
Malacothrix floccifera
woolly malacothrix
Alx
narrow-leaved meconella
A2
Meconella linearis (historical-1983
but not seen since)
Mentzelia affmis
Al
Mentzelia dispersa
Nada stick-leaf
Alx
Micropus califomicus var.
subvestitus (historical-l 930)
(var. califomicus is more conunon)
Microseris campestris
Microseris elegans
MICROSERIS SYLVATICA
Mimulus latidens
MYOSURUS MINIMUS SSP.
APUS
Myosurus minimus ssp. minimus
Myosurus sessilis
Navarretia atractyloides
slender cottonweed .
A2
A2
*AI
Al
*AI
A2
A2
A2
*Al
A2
_...
Hydra stick-leaf
San Joaquin microseris
elegant microseris
sylvan microseris
broad-toothedmonkeyfJower
little mousetail
Grassland; Vernal Pools
Grassland; Vernal Pools
Grassland; Woodland
Vernal Pools; Misc. Wetlands
Alkali areas; Freshwater Marsh;
Vernal Pool
Freshwater Marsh; Vernal Pools
Grassland; Vernal Pools
Rock, Tallus or Scree; Sand or
Sandstone areas
Misc. Wetlands
Vernal Pools
common mouse-tail
sessile mouse-tail
holly-leaved navarretia
Al
NAVARRETIA COTULIFOLIA
Navarretia nigelliformis ssp.
nil!;elliformis
Navarretia viscidula
sticky riavarretia
A2
Al
Orobanche bulbosa
Orobanche califomica ssp.jepsonii
bulbous broom-rape
Jepson broom-rape
A2
Al
Orobanche vallicola
Parietaria hespera var. californica
California broom-rape
California pellitory
Al
Al
A2
Peetocarva penicilIata
Pediomelum californicum
Penstemon centranthifolius
winged pectocarya
Indian breadroot
scarlet bugler
A2
Al
Al
A2
Penstemon heterophyllus var. purdyi
Pentachaeta alsinoides
Pentachaeta exilis sso.exilis
Phacelia breweri
foothill penstemon
tiny ventachaeta
meager oentachaeta
Brewer's phacelia
A2
Al
A2
A2
A2
AI·
A2
A2
Phacelia divaricata
Phacelia doul!;lasii
Phacelia tanacetifolia
PilulariaAmericana
Pinus coulteri
Plagiobot lIVs infectivus
Plagiobot :rrys leptocladus
Plagiobot:rrys tenellus
divaricate phacelia
Douglas' phacelia
tansy phacelia
pillwort
Coulter pine
dye POpComflower
alkali placiobothrvs
slender popcomflower
cG'V
Sandstone; Misc. habitats
Bums; Chaparral
Grassland; Scrub; Sand or
Sandstone
Bums; Chaparral; Woodland; Misc.
habitats
Dry Washes; Grassland; Sand or
Sandstone
Grassland; Sand or Sandstone;
Woodland
Rock, Tallus or Scree; Sand or
Sandstone areas
Dry Open Slopes; Misc. habitats
cotula navarretia
adobe navarretia
Freshwater Marsh; ~land; Sand
or Sandstone; Vernal Pools
Chaparral
Rock, Tallus or Scree; Sand or
Sandstone areas
Forest; Woodland
Chaparral; Rock, Tallus orScree;
Sand or Sandstone; Woodland
Misc. habitats
Chaparral; Woodland
Chaparral; Sand or Sandstone;
Woodland
Chaparral; Forest; Grassland
Grassland
Grassland
Chaparral; Rock, Tallus or Scree;
Woodland
Chaparral; Grassland; Woodland
Sand or Sandstone
Gravel; Sand or Sandstone
Vernal Pools; Misc. Wetlands
Chaparral; Forest
Misc. habitats
Alkali areas
Misc. habitats
Roddy Ranch DEIR comments, page 9
(I) fiJd441fo tf2 f1~set1lllfj(tn: of(J'afifal'l1iA nt#fllII (fDm
A2
Grasslai:J.d; Woodland
VemalPools
Scrub; Woodland
Al
Al
Al
oak
A2
Al
A2
Alx
Al
Al
s
*Al
A2
Al
nest-straw
nbbed fiinl!:e DOd
bull clover
A2
Al
A2
A2
slender trooidocaroum
.slender vetch
hairy-leaved fescue
A2
Nuttall's fescue
A2
slender fescue
A2
cile
Forest; Woodland
Grassland; Woodland
Freshwater Marsh
Alkali areas; Salt Marsh
Gravel; Sand or Sandstone
Misc. Wetlands
Misc. habitats
Alkali areas; Grassland
Dry Washes; Rock, Tallus or Scree;
Sand or Sandstone
Sand or Sandstone; Misc. habitats
Misc. habitats
Alkali areas; Grassland; Serpentine;
Misc. Wetlands
Alkali areas; Grassland
Grassland; Scrub
Dry Open Slopes; Grassland; Sand
or Sandstone; Scrub
Dry Open Slopes; Rock, Tallus or
Scree; Sand or Sandstone;
Seroentine; Woodland
Burns; Sand or Sandstone; Misc.
habitats
NOTE: Some of these plant species are only known from the area historically and have not been reported
for quite some time. It should not necessarily be assumed, however, that they no longer exist here as they
may be on private land or hard-to-reach areas where surveys have not been done for a longtime, if ever. In
recent years, several plant species have been rediscovered in the East Bay that had not been reported in the
area since the late 1800's or early 1900's.
Dates indicated for historical species refer to the last known record in the Alameda-Contra Costa Counties
area, not necessarily the area descnbed in the title.
Explanation of Ranks
*Al or *A2: Species in Alameda and Contra Costa counties listed as rare, threatened or endangered
. statewide by federal or state agencies or by the state level ofCNPS.
.
A1x: Species previously known from Alameda or Contra Costa Counties, but now presUmed extirpated
here.
AI: Species currently known from 2 or less regions in Alameda and Contra Costa Counties.
A2: Species currently known from 3 to 5 regions in the two counties, or,· if more, meeting other important
criteria such as small populations, stressed or declining populations, small geographical range, limited or
threatened habitat, etc;
Al ?: Species with taxonomic or distribution problems that make it unclear if they actually occur here.
Roddy Ranch DEIR comments, page 10
(l)OJC4k1fo f~ft'M~QnofClIIi{o1hJ.f4IJIt51fM {Fom
~_.~.}-
j'
APPENDIX 2: CEQA-Protected Rare and Unusual Plants
of Horse Valley
2006
(Statewide Rare Plants in Upper Case)
Rank
in East
........
A1
*A2
*A1
Al
A2
A1
A2
A2
Al
A2
~----
. Atriplex argentea var. mohavensis
ATRIPLEXCORONATA VAR.
CORONATA
BLEPHARIZONlA PLUMOSA
Calycadenia multiglandulosa
Downingia insignis
Eschscholzia caespitosa
Navarretia atractyloides
Navarretia nigelliformis ssp.
nigellifoilllis
Plagiobothrys infectivus
Plectritis ciliosa ssp. insignis
C ---
_
--­
--_ ... - -
........ .......
silverscale
crownscale
Alkali areas
Alkali areas; Grassland; Vernal Pools
Big taIplant
sticky calycadenia
cupped downingia
tufted poppy
holly-leaved navarretia
adobe navarretia
Grassland; Scrub
Rock, Tallus or Scree; Scmb
Vernal Pools
Chaparral
Rock, Tallus or Scree; Sand or
Sandstone areas
Vernal Pools
dye popcomflower
long-spurred plectritis
Misc. habitats
Grassland; Woodland
Explanation of Ranks
*Al or *A2: Species in Alameda and Contra Costa counties listed as rare, threatened or endangered
'statewide by federal or state agencies or by the state level of CNPS.
Alx: Species previously known from Alameda or Contra Costa Counties, but now presumed extirpated
. here.
.
At: Species currently known from 2 or less regions in Alameda and Contra Costa Counties.
A2: Species currently known from 3 to 5 regions in the two cQunties, or, ifmore, meeting other important
criteria such as small populations, stressed or declining populations, small geographical range, limited or
threatened habitat, etc.
Al ?: Species with taxonomic or distribution problems that make it unclear if they actually occur here.
Roddy Ranch DEIR comments, page 11
(I) OuUl14ktffo f& f'f'Mcrwllot1 of(;alt{o,.,llllnAHw {fora
APPENDIX C
Special Status Plant Species Assessment Table
9
Roddy Ranch Special Status Vegetation Table
Scientific name
Common name
Status
Habitat
Potential
habitat
on-site
Range
Known
Rangel
Critical
habitat
Elevation
Life Form
Potential for
Flowering!
Occurrence OnSurvey
site
Period
Plants
IAl/enroljea
occidentalis
iodine bush
CNPSA2 ALKALI AREAS
Yes
San Joaquin Valley, e
San Francisco Bay
Area, Inner South
Coast Ranges, n
Western Transverse
Ranges, e Peninsular
Ranges, s East of
Sierra Nevada, Desert
Yes
Sierra Nevada
Foothills, Tehachapi
W..ountamArea,--­ ..
Sacramento Valley,
Central Coast, San
Francisco Bay Area,
South Coast Ranges,
Southwestern
California
Yes
North Coast Ranges,
Sierra Nevada, San
Francisco Bay Area,
South Coast Ranges,
Transverse Ranges,
Peninsular Ranges, n
East of Sierra Nevada,
Desert Mountains
Yes
Sierra Nevada
Foothills, Great
Central Valley, Central
Western California,
Southwestern
California, White and
Inyo Mountains
-
IAllium peninsulare
CNPS
var. peninsulare
peninsular onion
Alx
(historical-1954)
Allophylhlm
gilioides ssp.
violaceum
Amaranthus
powellii
Amsinckia
douglasiana
(hisJorical-1938)
Amsinckia
grandiflora
Amsinckia lunaris
straggling gilia
Powen's
amaranth
I;1rctostaphylos
ssp.
glandulosa
~landulosa
GRASSLAND; SAND or
CNPSAI SANDTONE~MISe.
HABITATS
CNPSAI MISC. HABITATS
DRY OPEN SLOPES;
ROCK, TALLUS or
SCREE
Douglas'
fiddleneck
CNPS
Alx
large-flowered
fiddleneck
FE, CE,
GRASSLAND,
CNPS lB,
CISMONTANE
CNPS
WOODLAND.
*AI
bent-flowered
fiddleneck
Amsinckia
Tessenate
tessel/ata var.
gloriosa (historical­ fiddleneck
1954)
;1rctostaphylos
auriculata
DRY OPEN SLOPES;
MISe. HABITATS
MtDiablo
manzanita
Eastwood
manzanita
Yes
South Coast Ranges,
Western Transverse
Ranges.
Yes
Los Vaqueros
Reservoir, Black
Diamond Mines
Regional Preserve,
Lawrence Livermore
Labs.
Yes
Inner North Coast
Ranges, west-eentral
Great Central Valley,
San Francisco Bay
Area.
Yes
Inner North. Coast
Ranges, Sacramento
Valley (Colusa Co.),
San Francisco Bay
Area, South Coast
Ranges, Western
Transverse Ranges,
Mojave Desert
COASTAL BLUFF SCRUB,
CISMONTAINE
CNPSlB
WOODLAND, VALLEY
AND FooTIllLL
GRASSLAND.
CNPS
Alx
SAND or SANDSTONE;
MISC. HABITATS
CNPS lB, CANYONS AND SLOPES
CNPS
IN SANDSTONE
Marginal Contra Costa County
*A2
CHAPARRAL
CNPSA2 CHAPARRAL
Yes
Klamath Ranges,
North Coast Ranges,
San Francisco Bay
Area
Page 1
~-~,.
Yes
Yes
Yes
Yes
Yes
Yes
<BOOm
< llOOm
1200­
2900m
<800m
100 - 600
m
275-550
meters
perennial
shrub
Not expected -­
moderate habitat
present but not
seen during
focused surveys
Jun-Aug
bulbiferous
herb
Not expected -­
high suitable
habitat but not
seen during
focused surveys
March-June
annual herb
Not expected -­
high suitable
habitat but not
seen during
focused surveys
May-July
annual herb
Not expected -­
high suitable
habitat but not
seen during
focused surveys
July-Oct
Annual herb
Not expected -high suitable
habitat but not
seen during
focused surveys
March-May
Annual herb
Not expected -­
high suitable
habitat but not
seen during
focused surveys
April-May
•
Yes
Yes
Yes
Yes
3-500
meters
Not expected -­
moderate suitable
Annual herb
habitat but not March-June
seendm:ing
focused swveys
50 -1700
m
Annual herb
Not expected -­
high suitable
habitat but not
seen during
focused site
surveys
Evergreen
Shrub
Not expected -­
low suitable
habitat but not
seen during
focused site
surveys
Perennial
shrub
Not expected -­
moderate suitable
habitat but not
seendm:ing
focused site
surveys
135-650
meters
300-1900
m
March
JanuaryMarch
Jan-March
Roddy Ranch Special Status Vegetation Table
Sdentific name
Arctostaphylos
manzanita ssp.
/aevigata
!A~emone rnunita
Common name
Contra Costa
manzanita
Status
CNPS IB
Habitat
CHAPPARAL (rocky);
SAND or SANDSTONE
BURNS; MISC.
HABITATS
prickly poppy
CNPSAI
Suisun Marsh
aster
MARSHES AND
SWAMPS (BRACKISH
AND FRESHWAlER).
CNPS IB
ENDEMIC TO THE
SAC/SAN JOAQUIN
RlVERDELTA
Potential
habitat
on-site
Yes
Range
s Inner North Coast
Ranges (Vaca Mtns),
eastern San Francisco
Bay Area (Mount
Diablo)
Northwestern
California (except
North Coast), Central
Western California,
Marginal
Southwestern
California, Great Basin
Floristic Province,
Desert
Known
Rangel
Critical
habitat
Potential for
Occurren~On­
Elevation
LifeForDl
site
perennial
evergreen
shrub
Not expected -­
moderate suitable
habitat but not
seen during
focused site
surveys
Yes
500-1100
meters
Yes
Not expected-­
moderate suitable
habitat but not
annnalor
70-3000m
seen during
perennial herb
focused site
surveys
Flowering!
Survey
Period
Jan-Feb
JWle-Sept
-
Aster /entus
No
Central Coast, SF Bay
Area, S. Sacramento
Valley
No
0-10 feet
Perennial
herb
Not expected: no
habitat on-site,
not in known
range
May-Nov
Annual herb
Not expected -­
high suitable
habitat but not
seen during
focused site
smveys
Feb-May
Perennial
herb
Not expected ­
high suitable
habitat but not
seen during
focused site
smveys
Feb-June
Not expected -­
high suitable
habitat but not
seen during
focused site
smveys
March-June
High suitable
alkaline prairie
habitat in the
northeastern part
of the
development area
along Empire
Mine Road where
it is present
July-Nov
Not expected -­
High
Suitable habitat
in development
Annual herb
area but not
found; Present on
site outside of
development area
AprilOctober
C&S Sierra Nevada
Astragalus
Two-seeded
didymocarpus var.
milkvetch
didymocarpus
!Astragalus
oxyphysus
Astragalus lener
var. tener
Diablo locoweed
CNPSAI GRASSLAND
CNPS
Al '?
GRASSLAND; SCRUB
ALKALI PLAYA,
VALLEY AND
alkali milk-vetch CNPS IB
FOOTHlIL GRASSLAND,
VERNAL POOLS.
Yes
Foothills, Tehachapi
Mountain Area, Great
Central Valley, Central
Western California,
Southwestern
California (except
Channel Islands),
Mojave Desert
Yes
s Sierra Nevada
Foothills, San Joaquin
Valley, Inner South
Coast Ranges
Yes
Alameda, Contra
Costa, Merced,
Monterey, Napa, San
Benito, Santa Clara,
San Francisco, San
Joaquin, Solano,
Sonoma, Stanislaus,
Yolo Counties
Yes
Yes
Yes
<700m
100-1200
m
1-60 meters annual herb
,
lAmp/ex argentea
var. rnohavensis
lAmp/ex cordulata
IAmplex coronata
var. coronata
silverscale
heartscale
crownscale
CNPSA2 ALKALI AREAS
CHENOPOD SCRUB,
VALLEY AND
CNPS lB
FOOTIIILL GRASSLAND,
MEADOWS
CNPS
*A2
ALKALI AREAS;
GRASSLAND; VERNAL
POOLS
Yes
Great Central Valley, e
San Francisco Bay
Area, e South Coast,
Desert
Yes
Alameda, Contra
Costa, Butte, Fresno,
Glenn. Kings, Kern,
Madera, Merced, San
Joaquin, Solano,
Stanislaus, Tulare and
Yolo Counties
Yes
s Sacramento Valley,
San Joaquin Valley, e
Inner South Coast
Ranges
Page 2
Yes
Yes
Yes
< 1000m
1-375
meters
<200m
annual
Annual herb
Not expected -high suitable
habitat but not
seen during
focused site
surveys
Mar-Oct
Roddy Ranch Special Status Vegetation Table
ScientifIc name
lAmplex
depressa
Common name
brittlescale
Status
Habitat
CHENOPOD SCRUB,
CNPS lB, MEADOWS, PLAYAS,
CNPS
VALLEY AND
*A2
FOOTHILL GRASSLAND,
VERNAL POOLS
Potential
habitat
on-site
Yes
Range
Alameda, Contra
Costa, Colusa, Fresno,
Glenn, Merced,
Solano, Tulare and
Yolo Cowties
Known
Rangel
Critical
habitat
Yes
Elevation
1-320
meters
LifeFonn
Potential for
Flowering!
Survey
Occurrence Onsite
Period
Not expected -­
high suitable
habitat but not
May-OctobeJ
Annual herb
seen during
focused site
surveys; observed
in vicinity
IAmplex
lioaquiniana
IAtriplex serenana
var. serenana
San Joaquin
saltbush
bractscale
CHENOPOD SCRUB,
CNPS lB, ALKALI MEADOW,
CNPSA2 VAlLEY AND
FOOTIllLL GRASSLAND.
CNPSAI
ALKALI AREAS;
COASTAL BLUFF
Yes
S. Sacramento Valley,
San Joaquin Valley,
Inner South Coast
Ranges (east slope)
Yes
s Sierra Nevada, San
Joaquin Valley, Outer
South Coast Ranges,
Southwestern
California, East of
Sierra Nevada
(naturalized), w
Mojave Desert,
Sonoran Desert
Yes
Northwestern
California, High
Cascade Range, Sierra
Nevada, Central
Western California,
Western Transverse
Ranges
FOREST~ GRASSLAND;
Balsamorhiza
deltoidea
deltoid
balsamroot
CNPSA2
SCRUB; SAND or
SANDSTONE~
WOODLAND
big-scale
balsamroot
CHAPARRAL,
CISMONTANE
CNPS lB WOODLAND, VALLEY
AND FOOTIllLL
GRASSLAND
Blepharizonia Jaxa
(E. plumosa ssp
bigtarweed
viscida in Jepson
Manual)
CHAPARRAL;
CNPSA2 GRASSLAND; SCRUB;
WOODLAND
[Blepharizonia
iPlumosa
CNPS lB, VALLEY AND
CNPS
FOOTHILL GRASSLAND;
SCRUB
*A2
Balsamorhiza
macrolepis
big tarplant
Calandrinia
breweri
Brewer's
calandrinia
Calochortus
lPulchellus
CHAPARRAL,
CISMONTANE
CNPS lB,
Mt. Diablo fairyWOODLAND,
CNPS
lantern
VAlLEYIFOOTHIIl
*A2
GRASSLAND;
SERPENTINE
CNPS
*A2
BURNS; CHAPARRAL;
SCRUB
Yes
East Cascade Range,
Sierra Nevada
Foothills, Sacramento
Valley, San Francisco
Bay Area, Modoc
Plateau
Yes
w San Joaquin Valley
(Alameda Co. s), e San
Francisco Bay Area,
South Coast Ranges
Yes
W. San Joaquin
Valley, E. SF Bay
Area, Inner/Outer
South Coast Ranges
No
North Coast Ranges, c
Sierra Nevada
Foothills, San
Francisco Bay Area,
Outer South Coast
Ranges, South Coast,
Western Transverse
Yes
Not expected -­
high suitable
habitat but not
3-1050 feet Annual herb
seen during
focused site
surveys; observed
in vicinity
Apr-Oct
Yes
Not expected -­
moderate suitable
habitat but not
seen during
focused surveys
May-Oct
Yes
No
< 2000 m
300-2400
m
90-1400
meters
Yes
<llOOm
Yes
100-1650
feet
Annual
Perennial
Not expected -­
moderate suitable
April-Jwe
habitat but not
seen during
focused surveys
Perennial
herb
Not expected -­
Moderate
suitable habitat
on-site but not
seen during
focused surveys
and no
observations in
Cowtv
March-Jwe
Annual
Not expected -­
moderate suitable
habitat but not
seen during
focused surveys
July-Oct
Present on Site
within the
Annual herb
development area
Jul-Oct
I
Yes
<1200m
Annual herb
Not expected -­
no suitable
March-Jwe
habitat in the
development site
Perennial
herb
Not expected -­
moderate suitable
April-Jwe
habitat but not
seen during
focused surveys
Ran~es
Calycadenia
multiglandulosa
sticky
calycadenia
CNPSAI
ROCK, TALLUS OR
SCREE; SCRUB
Yes
Contra Costa and
possibly Solano cowty
North Coast Ranges,
Sierra Nevada, Great
Central Valley, San
Marginal
Francisco Bay Area,
Inner South Coast
Yes
30-840
meters
Yes
75-1000m Annual herb
Yes
600-1524
meters
RanlreS
Calystegia
atriplicifolia ssp.
buttensis
Butte Cowty
morning-glory
LOWER MONTANE
CNPS lB CONIFEROUS FOREST,
CHAPARRAL
No
Butte, Contra Costa,
Del Norte, Mendocino,
Shasta and Tehama
Cowties
Perennial
rhizomatous
herb
Not expected -­
low suitable
habitat but not May-October
seen during
focused surveys
Not expected -­
no suitable
habitat on site
May-July
Page 3
-~
Roddy Ranch Special Status Vegetation Table
Scientific name
Camissonia
campestris ssp.
campestris
(historical-1940)
Camissonia
'waci1ijlora
Common name
Mohave suncup
hill SIDl cup
Camissonia
intermedia
small primrose
Camissonia
strigulosa
contorted
primrose
Status
CNPS
Alx
Habitat
CRASSLAND; SCRUB;
SAND or SANDSTONE
DRY OPEN SLOPES;
CNPSA2 GRASSLAND; SCRUB;
WOODLAND
CNPSA2 BURNS; SCRUB
CNPSAI
GRASSLAND; SAND or
SANDSTONE
chaparral
Campanula exigua
harebell
CHAPARRAL (rocky,
CNPS1B
usually serpentinite)
Centromadia panyi Congdon's
ssp. congdonii
tarplant
VALLEY AND
CNPSlB FOOTHILL GRASSLAND
(alkaline)
Chaenactis
glabriuscula var.
megacephala
yellow
pincushion
CNPSAI
DRY OPEN SLOPES;
SAND or SANDSTONE
Potential
habitat
on-site
Range
Known
Rangel
Critical
babitat
Elevation
life Form
Flowering!
Potential for
Occurrence OnSurvey
site
Period
Yes
Sierra Nevada
Foothills, Great
Central Valley, Central
Western California, e
Southwestern
California, Mojave
Desert
Yes
Northwestern
California, Cascade
Range, Sierra Nevada .
Foothills, Great
Central Valley, Central
Western California,
Western Transverse
Ranges
Yes
No
Northwestern
California, Central
Western California,
Southwestern
California
Yes
Yes
sedge s High Sierra
Nevada, Tehachapi
Mountain Area,
Central Western
California,
Southwestern
California, n Channel
Islands (Santa Rosa
Island), w Mojave
Desert
Yes
0-2l00m
Not expected -­
moderate suitable
Annual herb habitat but not March-May
seen during
focused surveys
No
Alameda, Contra
Costa, San Benito,
Santa Clara and
Stainslaus Counties
Yes
275-1250
meters
Annual herb
Yes
Alameda, Contra
Costa, Monterey, Santa
Clara, Santa Cruz, San
Mateo, Solano and San
Luis Obispo Counties
Yes
s Sierra Nevada
Footbills, Tehachapi
Mountain Area, San
Joaquin Valley,
Central Western
California, n
Southwestern
California
Yes
Yes
Yes
0-2000m
Not expected -­
moderate sui~ble
Annual herb habitat but not March-May
seen during
focused surveys
<800m
Not expected -­
moderate suitable
Annual herb habitat but not March-May
seen during
focused surveys
3QO-8oom Annual herb
Not expected -­
no suitable
habitat on site
Not expected -­
no suitable
habitat on site
April-July
May-June
1-230
meters
Not expected -moderate suitable
Annual herb habitat but not
seen during
focused surveys
May-Oct
(Nov)
< 1600m
Not expected -­
moderate suitable
Annual herb habitat but not
seen during
focused surveys
Feb-July
I
Chamaesyce
acel/ata ssp.
ocel/ata
Chorizanthe
membranacea
Clarkia modesta
Collinsia
bartsiifolia
bartsiifolia
VaT.
valley spurge
CNPSA2 SAND or SANDSTONE
CHAPARRAL; DRY
OPEN SLOPES;
pink spineflower CNPSA2 GRASSLAND;
WOODLAND; MISC.
HABITATS
modest clarlcia
White Chinese
houses
CNPSA2 WOODLAND
CNPSAI SAND or SANDSTONE
Yes
California Floristic
Province (except
Peninsular Ranges)
Yes
Northwestern
California, Cascade
Range, Sierra Nevada
Foothills, Tehachapi
Mountain Area, Great
Central Valley, Central
Western California, n
Western Transverse
Ranges
Yes
Inner North Coast
Ranges, C&S Sierra
Nevada Foothills, San
Francisco Bay Area,
South Coast Ranges
Yes
Northwestern
California, Cascade
Range Foothills, Sierra
Nevada Foothills,
Central Western
Califomia
Page 4
Yes
Yes
Yes
Yes
<500m
Not expected -­
moderate suitable
Annual herb habitat but not
seen during
focused surveys
May-Oct
< 1600m
Not expected -­
moderate suitable
April-July
Annual herb habitat but not
seen during
focused surveys
< 1000m
Not expected -­
moderate suitable
April-May
Annual herb habitat but not
seen during
focused surveys
<6oom
Not expected -­
moderate suitable
Annual herb habitat but not March-May
seen during
focused surveys
APPENDIX D
Definitions for Special Status Species Designations
10