Download FORBS herbaceous dicots

FORBS
herbaceous dicots
Ruth Newell
tinker’s
coffee
goldenrod
• broad-leaved herbs that die
back to ground level in winter
• perennials grow back each
year from underground
reserves
• annuals (e.g. touch-me-nots)
die altogether leaving only
seeds alive
Flip through slides..rose, buttercup, mustard
etc..getting main point of families. Slow down for
flower symmetry and flower arrangement slides.
PLANT FAMILIES IN FOUR PARTS:
A) RADIAL SYMMETRY B) BILATERAL SYMMETRY
C) COMPOSITE ARRANGEMENTS
D) UMBEL ARRANGEMENT
A
C
B
D
PART A: FLOWERS with RADIAL
SYMMETRY
Ranunculaceae, the buttercup family.
Characteristics: herbs, radially symmetrical flowers, 5
petals & sepals, many stamens and unfused ovaries,
compound leaves, sheathing petioles.
Yellow Water-crowfoot, native;
Ranunculus gmelinii
compound leaf
Ranunculus repens, exotic; creeping buttercup
Tall Meadow Rue
Thalictrum
pubescens
-- Lacey leaf
-- No petals
compound lvs.
Rosaceae, Rose Family. usu. radially
symmetrical flrs., 5 petals, many stamens; alternate
lvs., serrate margins, stipules.
Purple Avens
Geum rivale)
Marsh Cinquefoil
Comarum palustre
Brassicaceae Mustard Family
Characteristics (fam.): herbs; 4
sepals, 4 petals, 6 stamens, 2loculed ovaries; acrid juice,
mustard oils.
“Cruciferae Family” (crossed
petals)
Yellow Rocket (Barbarea vulgaris)
Cuckoo Flower
Cardamine pratensis
Primulaceae, Primrose
Family
family characteristics:
herbaceous plants
petals and sepals 5-parted
but both fused into tube at
base
stamens attached to inside
petal tube, opposite petal
lobe
entire leaves
swamp candle
Lysimachia terrestris
Onagraceae, Evening
Primrose family
Hairy Willow-herb (Epilobium ciliatum)
petals & sepals
usu. four-parted,
petal fused into
tube at base.
diverse genus in
NS, Epilobium
(willow-herbs),
with 9 species.
Polygonaceae,
Knotweed Family
lady’s thumb,
Polygonum persicaria
no clear distinction between
petals and sepals: accessory
organs are termed “tepals”
nodes have sheathing
stipules, ochrea
ochrea sheath
petaloid tepals
in Rumex