| Dioscorea dumetorum (Kunth) Pax |
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| Famille : DIOSCOREACEAE |
| Protologue : Nat. Pflanzenfam. 2(5): 133 (1888) |
| Informations sur le genre : Dioscorea |
| Basionyme : Helmia dumetorum Kunth |
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Statut
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| Statut pour TA : | accepté (présent) |
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| Synonyme(s) homotypique(s) |
 Dioscorea triphylla var. dumetorum (Kunth) R. Knuth |
| Helmia dumetorum Kunth (1850) |
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| 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. |
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| Ecologie et distribution |
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| 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. |
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| 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. |
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Tubers used as famine food, after washing and drying to remove toxic alkaloids. |
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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). |
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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).
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| 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 |
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| Carte |
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| Enregistrement n°11209 modifié le 2008-04-23 |
| Retour d'information concernant cette fiche |
