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Leaf
Stipules
present
absent
Flower
Stamen Number
1
2
Pollen
dyads
monads
Tepals
present
absent
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
Flower projecting from ruptured spathella
No
Yes
Andropodium
Absent
Present
Stems orientation
prostrate (attached along their length)
upright (1 attachment point)
Flowers surrounded by fused leaf sheaths...
No
Yes