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Hansen & Rahn | Family List

Dioscoreaceae R. Brown

habit
woody plants, herbaceous plants

hairs
glandular, stellate, 2-armed or T-shaped, non-glandular

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

leaf: position
opposite or verticillate, alternate

leaf: nature
not compound, compound, palmately compound

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

margin
with entire margin, lobed or divided

leaf: stipules
absent

inflorescence
raceme, spike, compound, sympodial or monopodial

flower: sexuality
unisexual

flower: symmetry
actinomorphic

flower: receptacle
enlarged, completely united with the ovary, totally or partially covering it

flower: disc
absent

flower: perianth number
6, 7+

flower: perianth nature
perianth of similar segments

flower: sepal number
0, 6+

flower: sepal position
all free from one another, connate

flower: sepal nature
sepals imbricate or contorted

flower: petal number
0, 6

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

stamen: number
1, 3, 6

stamen: symmetry
the same number as and opposite the petals or alternate with the sepals

stamen: anthers
basifixed, introrse, extrorse, opening by longitudinal slits

stamen: filaments
free from the corolla, not connate, connate into 1 tube or bundle

stamen: other characters
staminodia present

pistil: style
styles more than 1, free, style 1, or styles more or less connate

pistil: carpel
3

pistil: ovary
1-locular, 3-locular

pistil: ovule
2 in each loculus

pistil
ovules axile, carpels connate, ovules attached to the central axis or ventrally in apocarpae

fruit: type
a capsule, fleshy

fruit: seed
3+ seeds

seed: embryo
straight

seed: endosperm
seeds with endosperm


 

Related Objects  

Flora of China  
  • Dioscorea alata
  • Image/JPEG
  • PDF File
  • PDF

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