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 African Plants - a Photo Guide
see under Flora of Zimbabwe
 
Map
carte afrique num 11209
 
Record n°11209 modified 2008-04-23
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