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Hansen & Rahn | Family List

Alismataceae Ventenat

habit
woody plants, herbaceous plants

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

hairs
stellate, stellate

distribution
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

margin
with entire margin

leaf: stipules
absent

inflorescence
solitary, raceme, umbel, compound, sympodial or monopodial

flower: sexuality
bisexual, unisexual

flower: symmetry
actinomorphic

flower: receptacle
small, enlarged, conical or hemispherical

flower: disc
absent

flower: perianth number
3, 6

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

flower: sepal number
3

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
1-locular

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

pistil
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
curved

seed: endosperm
seeds without endosperm


 

Related Objects  

A Checklist for the South China Botanical Garden, Guangzhou, Guangdong Province, P. R. China  
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    Flora of China  
  • Alismataceae (PDF)
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    Interactive Keys by Xiangying Wen  
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