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Leaf
Stipules
present
absent
Flower
Stamen Number
1
2
Tepals
present
absent
Pollen
dyads
monads
Podostemaceae
Rib number
3
4
5
6
7
8
9
Papillae on upper capsule valve
yes
no
Flowers arise from foliaceous roots
yes
no
Andropodium
Absent
Present
Flowers embedded in cavity of stem
Yes
No
Flower projecting from ruptured spathella
No
Yes
Stems orientation
upright (1 attachment point)
prostrate (attached along their length)
Flowers surrounded by fused leaf sheaths...
No
Yes