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