African Plant Database


Dioscorea dumetorum (Kunth) Pax
Family : DIOSCOREACEAE
Protologue : Nat. Pflanzenfam. 2(5): 133 (1888)
Information on the genus : Dioscorea
Basionym : Helmia dumetorum Kunth
 
 
Status
Status for TA : accepted (present)
 
Synonym(s) Homotypic
 Dioscorea triphylla var. dumetorum (Kunth) R. Knuth
 Helmia dumetorum Kunth (1850)
 
Synonym(s) Heterotypic
=Dioscorea triphylla Schimp. ex Kunth (1850)
=Dioscorea buchholziana Engl. (1886)
=Dioscorea daemona Hook. non Roxb.
=Dioscorea dumetorum var. glabrescens A. Chev.
=Dioscorea dumetorum var. lanuginosa A. Chev.
=Dioscorea dumetorum var. vespertilio A. Chev.
=Dioscorea triphylla var. abyssinica R. Knuth
=Dioscorea triphylla var. rotundata R. Knuth
=Dioscorea triphylla var. tomentosa Rendle
=Dioscorea triphylla A. Rich.
 
Ecology and distribution
Trop. Afr.
Biology : Vine to 5-10 m long; tuber replaced annually, solitary, deeply lobed or main tuber with several smaller tubers in a dense cluster 2,5-7 cm Ř, spreading or to 30 cm deep from soil surface; indumentum of simple straight or curved hairs, 0,1-1 mm long, on stems, leaves (on upper surface coarse, on lower surface soft), capsule wings; stems usually annual, left-twining, with prickles especially towards base; leaves alternate, 3-foliolate, anteriour leaflet apex obtuse to rounded or rarely truncate, apiculate to long-acuminate, to 21 cm long; petiole to 20 cm long, pubescent, somewhat prickly; petiolules to 1 cm long; leaflets asymmetrical; male inflorescence usually only present when leaves are fully expanded, compound; partial inflorescences sessile, rarely on rather stout peduncles to 5 mm long; flowers dense, hiding axis; capsule with 3 longitudinal wings, 3,1-5,3x1,5-2,5 cm, sparsely pubescent; seeds winged at base.
Ecology : Edges of rain-forest; dry evergreen forest; evergreen bushland; termite hills in Brachystegia woodland; edge of savanna; persisting in plantations and in secondary thickets and grasslands; roadsides; riverbanks; rocky areas; wooded savannas; hollows; forest gallery; marigot edges; regrowths; fallows; lateritic soils; Combretum-Terminalia woodland; 0-2020 m alt.
  Tubers used as famine food, after washing and drying to remove toxic alkaloids.
  S. Tomé, Príncipe, Annobón; S. Africa. Material cited from Asia is D. hispida Dennst. (or are they conspecific ?, cf. Wilkin & Thapyai, Fl. Thailand 10/1: 71, 2009).

Bibliography for Tropical Africa :
  • Darbyshire, I. Kordofami, M. & al. (2015). The plants of Sudan and south Sudan, An annoted checklist. Kew Publishing

Bibliography for Southern Africa :
  • List South. African Succ. Pl. : 67 (1997).
  • Checklist Flow. Pl. Sub-Saharan Africa : 754 (2006).
 
More info on :
see under Jstor_African Plant Initiative
see under Flore d'Afrique Centrale
see under Fgui
see under The International Plant Name Index
see under Flora of Mozambique
see under Flora of Zimbabwe
see under African Plants - a Photo Guide
 
Map
carte afrique num 11209
 
Record n°11209 modified 2008-04-23
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