Home >> Checklist: Asclepias of Colorado >> Previous version of Key >> Identification Key (new version): Asclepias of Colorado
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Plant
habit
shrubs
aquatic & OBL wetland species
Leaves
arrangement/phyllotaxy
alternate
opposite
whorled
leaf attachment
sessile or nearly so
leaf stalk (petiole) clearly present
leaf(let) base
attenuate
clasping
cordate
cuneate
obtuse
rounded
broadest point of leaf (leaflet)
broadest at middle
broadest below middle
Flower
principal flower color
white or cream
purple
green
yellow
orange
red
pink
brown
corolla (petal) fusion
petals separate
fused, at least toward base