African Plant Database


Dioscorea longicuspis R. Knuth
Family : DIOSCOREACEAE
Protologue : Notizbl. Bot. Gart. Berlin-Dahlem 11: 1059 (1934)
Information on the genus : Dioscorea
 
 
Status
Status for TA : accepted (present)
 
Synonym(s) Heterotypic
=Dioscorea schimperiana var. nigrescens R. Knuth
 
Ecology and distribution
Trop. Afr.
Biology : Tuber annual, branching at top, branches descending vertically, cylindrical, to 60 cm long, 10 cm Ø; stems twining, > 6 m long, with sparse stellate hairs, soon glabrescent; leaves usually opposite; petiole 6-15 cm long; blade ovate, rarely heart-shaped, to 12-14x7-11 cm, clothed with stellate hairs, base from deeply and widely cordate to subtruncate, apex acutely acuminate; inflorescences descending, spicate; male to 6-12 per leaf-axil, to 7-11 cm long, flowers sessile, directed away from the axis; female 3-5 per leaf-axil, to 25 cm long; capsule c. 4 cm Ø, glabrescent; seeds winged all round.
Ecology : Rain-forest; often persisting in secondary growth after felling; 1000-1960 m alt.
  Variable in degree of indumentum of leaves, also in size of capsule. Near D. hirtiflora.
 
More info on :
see under Jstor_African Plant Initiative
see under The International Plant Name Index
 
Map
carte afrique num 11250
 
Record n°11250
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