Developmental Deformities in Amphibians
... (“positional values”), and if their spatial organisation
is disturbed they undergo a characteristic cellular
growth response called “intercalation” (French et
al., 1976; Bryant et al., 1981). This phenomenon is
the basis of the well-known Polar Coordinate Model
(PCM) of limb pattern formation (Frenc ...
Sessions and Ruth (1990)
... cornm.), a digenetic trematode that uses garter
snakes ( ~ h a m n o p h i as
s ~ its primary host (Ingles,
'33). The metacercaria cysts, each approximately
200 pm in diameter, were embedded primarily
within the tissues at the base of the hind limbs
(Figs. 3, 5, 6), but were also found elsewhere in
Tree and Shrub Descriptions
... The leaves are alternate, simple, ovate to oval, finely serrated to irregularly
toothed or lobed, and usually dark or olive green above and paler green below.
The bark is ridged to scaly, dark gray or reddish gray. The small apples are 1/4
to 1/2 inch in diameter. The white blossoms are especially a ...
Ornamental - Lawrence Landscape
... The Royal Raindrops Crabapple has bright
pinkish-red flowers that combine with deep
purple cut leaf foliage to present a unique crab.
It contains deeply lobed leaves and upright
form with good branching and density.
Cornus kousa - Environmental Horticulture
... Family: Cornaceae
USDA hardiness zones: 5 through 8 (Fig. 2)
Origin: not native to North America
Uses: container or above-ground planter; near a deck
or patio; screen; specimen
Availability: generally available in many areas within
its hardiness range
methods - Proceedings of the Royal Society B
... measured for compound leaves since browsers would be likely to pluck off whole
leaves than individual leaflets. Leaf size (0.67 x length x breadth) was ranked as
follows: 0-60 mm2 = 1, 61-120 = 0.7, 121-240 = 0.5, 241-480 = 0.3, >480 mm2 = 0.
All traits listed in Table 1 were scored from 0 to 1 wher ...
Cottonwood - River Keepers
... The Cottonwood is the largest, fastest-growing native
North Dakota tree. The largest Cottonwood in North
Dakota is 110 feet tall with a 94-foot-wide canopy. It
thrives in moist soils along rivers and in wetlands and
prefers loam or sandy soil. Requires moist soil and
Crown height: 50-100 f ...
Prunus x yedoensis Yoshino Cherry
... walks or near a water feature. Not a street or parking
lot tree due to drought-sensitivity. Large specimens
take on a weeping habit with delicate branchlets
arranged on upright-spreading branches affixed to a
short, stout trunk. A lovely addition to a sunny spot
where a beautiful specimen is needed. ...
Lagerstroemia indica Crape-Myrtle
... parking lot islands (> 200 square feet in size); wide
tree lawns (>6 feet wide); medium-sized parking lot
islands (100-200 square feet in size); medium-sized
tree lawns (4-6 feet wide); recommended for buffer
strips around parking lots or for median strip plantings
in the highway; near a deck or pat ...
Pseudotsuga menziesii Douglas-fir
... The tree prefers a sunny location with a moist soil
and is not considered a good tree for much of the
South. It grows but struggles in USDA hardiness zone
7. Douglas-Fir transplants best when balled and
burlapped and has a moderate growth rate. It tolerates
pruning and shearing but will not tolerate ...
... source of salicin which is broken down to salicylic acid,
the main component in aspirin.
... Prairie Cascade Willow (Salix x ‘Prairie Cascade’) Parentage Laurel Willow x Weeping Golden Willow
Tabebuia caraiba: Trumpet Tree1
... open canopy and should not be cause to eliminate this
beautiful tree from your tree palette. To the contrary,
it is one of the most beautiful trees in flower which
has a place in most landscapes.
The pink Trumpet Tree ( Tabebuia heterophylla
) is the one most suited for street tree planting since it ...
Spathodea campanulata African Tulip-Tree
... winter and until late spring, African Tulip-Tree
produces terminal clusters of beautiful blooms held
above the foliage, a profusion of upwardly-facing,
orange and yellow flowers which open several at a
time from curved, two-inch-long, fuzzy brown flower
buds filled with water. African Tulip-Tree is ...
The Cabbage Palm One native Southeastern US palm tree is a
... The Cabbage Palm
One native Southeastern US palm tree is a common sight around the state of Florida and has served us well throughout
history. The Cabbage Palm (Sabal palmetto) was adopted as our official state tree in 1953. In 1970, the Florida
legislature decided to replace the cocoa palm on the s ...
Coccothrinax argentata Silverpalm
... This slow-growing, small, native Florida palm can
reach 20 feet in height but is usually seen at 6 to 10
feet with a spread of six feet (Fig. 1). The slender
Silverpalm has distinctive dark blue-green, drooping,
delicate, deeply divided palmate leaves which have a
beautiful silver color beneath, pro ...
Grevillea robusta Silk-Oak Fact Sheet ST-285 1
... Roots: surface roots are usually not a problem
Winter interest: no special winter interest
Outstanding tree: not particularly outstanding
Invasive potential: little, if any, potential at this time
Pest resistance: long-term health usually not
Tristaniopsis laurina syn. Tristania laurina
... CULTURE & USE; Shade tree, roadsides, parks, gardens. Minimum natural rainfall 750mm.
PRUNING; Formative pruning when young to develop a strong central leader and bushy canopy may be
beneficial. Once the tree is established minimal pruning should be required apart from the control of the
Tree crown measurement
The crown of a tree consists of the mass of foliage and branches growing outward from the trunk of the tree. The average crown spread is the average horizontal width of the crown, taken from dripline to dripline as one moves around the crown. Some listings will also list the maximum crown spread which represents the greatest width from dripline to dripline across the crown. Other crown measurements that are commonly taken include limb length, crown volume, and foliage density. Canopy mapping surveys the position and size of all of the limbs down to a certain size in the crown of the tree and is commonly used when measuring the overall wood volume of a tree.Average crown spread is one of the parameters commonly measured as part of various champion tree programs and documentation efforts. Other commonly used parameters, outlined in tree measurement, include height, girth, and volume. Additional details on the methodology of tree height measurement, tree girth measurement, and tree volume measurement are presented in the links herein. American Forests, for example, uses a formula to calculate Big Tree Points as part of their Big Tree Program that awards a tree 1 point for each foot of height, 1 point for each inch of girth, and ¼ point for each foot of crown spread. The tree whose point total is the highest for that species is crowned as the champion in their registry. The other parameter commonly measured, in addition to the species and location information, is wood volume. A general outline of tree measurements is provided in the article tree measurement and more detailed instruction in taking these basic measurements is provided in “The Tree Measuring Guidelines of the Eastern Native Tree Society” by Will Blozan.