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Hansen & Rahn | Family List

Zosteraceae Dumortier

habit
herbaceous plants

important diagnostics
aquatic plants, leaves floating or submerged

distribution
Asian, European, North American

leaf: position
alternate

leaf: nature
not compound

leaf: venation
longitudinal in leaves or leaflets

margin
with entire margin, dentate

leaf: stipules
absent

inflorescence
spike

flower: sexuality
unisexual

flower: symmetry
zygomorphic or irregular

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, opening by longitudinal slits, 1-locular at anthesis

stamen: filaments
free from the corolla, not connate

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

pistil: carpel
1

pistil: ovary
1-locular

pistil: ovule
1 in each loculus

pistil
carpels free from each other or carpel 1, ovules attached to the apex of the ovary

fruit: type
a nut

fruit: seed
1 seed

seed: embryo
straight

seed: endosperm
seeds without endosperm


 

Related Objects  

Flora of China  
  • Zosteraceae (PDF)
  • PDF

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