Base de données des plantes d'Afrique


Dioscorea dumetorum (Kunth) Pax
Famille : DIOSCOREACEAE
Protologue : Nat. Pflanzenfam. 2(5): 133 (1888)
Informations sur le genre : Dioscorea
Basionyme : Helmia dumetorum Kunth
 
 
Statut
Statut pour TA : accepté (présent)
 
Synonyme(s) homotypique(s)
 Dioscorea triphylla var. dumetorum (Kunth) R. Knuth
 Helmia dumetorum Kunth (1850)
 
Synonyme(s) hétérotypique(s)
=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.
 
Ecologie et distribution
Afr. Trop.
Biologie : 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 Ø, 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.
Ecologie : 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).

Bibliographie pour l'Afrique Tropicale :
  • Darbyshire, I. Kordofami, M. & al. (2015). The plants of Sudan and south Sudan, An annoted checklist. Kew Publishing

Bibliographie pour l'Afrique Australe :
  • List South. African Succ. Pl. : 67 (1997).
  • Checklist Flow. Pl. Sub-Saharan Africa : 754 (2006).
 
Plus d'info sur :
voir d'autres informations sous Jstor_African Plant Initiative
voir d'autres informations sous Flore d'Afrique Centrale
voir d'autres informations sous Fgui
voir d'autres informations sous The International Plant Name Index
voir d'autres informations sous Flora of Mozambique
voir d'autres informations sous Flora of Zimbabwe
voir d'autres informations sous African Plants - a Photo Guide
 
Carte
carte afrique num 11209
 
Enregistrement n°11209 modifié le 2008-04-23
Retour d'information concernant cette fiche