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Hansen & Rahn | Family List

Hydrostachyaceae Engler

habit
herbaceous plants

important diagnostics
aquatic plants, leaves floating or submerged

distribution
African

leaf: position
alternate

leaf: nature
not compound

leaf: venation
pinnate or hardly visible in leaves or leaflets.

margin
lobed or divided

leaf: stipules
absent, present

inflorescence
spike

flower: sexuality
unisexual

flower: symmetry
actinomorphic

flower: receptacle
small

flower: disc
absent

flower: perianth number
0

flower: sepal number
0

flower: petal number
0

stamen: number
1

stamen: anthers
dorsifixed or ventrifixed, extrorse, opening by longitudinal slits

stamen: filaments
free from the corolla, not connate

pistil: style
styles more than 1, free

pistil: carpel
2

pistil: ovary
1-locular

pistil: ovule
3+ in each loculus

pistil
ovules parietal, carpels connate

fruit: type
a capsule

fruit: seed
3+ seeds

seed: embryo
straight

seed: endosperm
seeds without endosperm


 

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