Taxon:

Display as:
Plant
  habit
   shrubs
   herbaceous
   aquatic & OBL wetland species
  special groups
   milkweeds
  plant coloration
   green leaves and/or stems present
  longevity
   annual or biennial
   perennial
  stature
   erect or ascending; neither prostrate nor scapose
  armature
   unarmed
  sap
   latex present
  reproductive mode
   produces flowers, fruits, seeds
  leaves/twigs aromatic when crushed
   without marked odor
Stem & Twigs
  succulent vs non-succulent
   succulent
   not succulent
Leaves
  arrangement/phyllotaxy
   alternate
   opposite
   whorled
  blade division
   all simple
  venation
   pinnately veined
   parallel-veined
  leaf (blade) presence
   leaf blades present
  leaf attachment
   sessile or nearly so
   leaf stalk (petiole) clearly present
  stipules
   stipules absent
  leaf (leaflet) margin
   entire
   revolute
  leaf(let) base
   attenuate
   clasping
   cordate
   cuneate
   obtuse
   rounded
   truncate
  broadest point of leaf (leaflet)
   broadest at middle
   broadest below middle
  tendrils
   absent
  fleshy or succulent leaves
   not fleshy/succulent
Inflorescence
  type
   solitary
   umbel
   panicle
   cymose
  plant sexuality
   bisexual flowers
Flower
  principal flower color
   white or cream
   purple
   green
   yellow
   orange
   red
   pink
   brown
  flower type
   radial symmetry 5 petals
  perianth
   calyx and corolla present
  calyx (sepal) fusion
   sepals fused (synsepalous)
  corolla (petal) fusion
   petals separate
   fused, at least toward base
  corolla symmetry
   regular
  ovaries/pistils per flower
   1
   2-5
  number of fertile stamens
   5
  stamen fusion
   distinct, attached on or below ovary
  ovary position
   sepals/petals attached below middle of ovary (ovary superior)
  ovule placentation
   marginal
Fruit or Cone
  fruit consistency at maturity
   dry/leathery
  Fruit Dehiscence
   dehiscent (splits open)
  mature fruit dehiscence
   opening along 1-2 seams
  appendages
   copious hair

Asclepias of Arizona

Nabhan, Buckley, and Fishbein
Species Count: 31

Apocynaceae