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Hansen & Rahn | Family List

Alismataceae Ventenat

woody plants, herbaceous plants

important diagnostics
aquatic plants, leaves floating or submerged, chlorophyll absent, milky juice present, cladodes or phyllodes

stellate, stellate

African, Asian, Australian and Oceanian, European, North American, South American

leaf: position
alternate, distichous

leaf: nature
not compound

leaf: venation
longitudinal in leaves or leaflets, palmate in leaves or leaflets

with entire margin

leaf: stipules

solitary, raceme, umbel, compound, sympodial or monopodial

flower: sexuality
bisexual, unisexual

flower: symmetry

flower: receptacle
small, enlarged, conical or hemispherical

flower: disc

flower: perianth number
3, 6

flower: perianth nature
perianth of similar segments, perianth of calyx and corolla

flower: sepal number

flower: sepal position
all free from one another

flower: sepal nature
sepals imbricate or contorted

flower: petal number
0, 3

flower: petal position
all free from one another, petals imbricate

stamen: number
3, 6, 9, 11+

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

stamen: filaments
free from the corolla, not connate

pistil: style
styles absent, stigmas sessile, style 1, or styles more or less connate, style gynobasic

pistil: carpel
3, 4, 5, 6+

pistil: ovary

pistil: ovule
1 in each loculus, 2 in each loculus, 3+ in each loculus

carpels free from each other or carpel 1, ovules attached to the central axis or ventrally in apocarpae, ovules attached to the base of the ovary

fruit: type
a capsule, a nut

fruit: seed
1 seed, 2 seeds, 3+ seeds

seed: embryo

seed: endosperm
seeds without endosperm


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