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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