Base de données des plantes d'Afrique


Dioscorea cochleariapiculata De Wild.
Famille : DIOSCOREACEAE
Protologue : Bull. Jard. Bot. État 4: 350 (1914)
Informations sur le genre : Dioscorea
 
 
Statut
Statut pour SA : accepté (présent)
Statut pour TA : accepté (présent)
 
Synonyme(s) hétérotypique(s)
=Dioscorea stolzii R. Knuth (1924)
 
Ecologie et distribution
Afr. Trop.
Biologie : Vigorous climbing vine to 15 m long, shoots usually annual, left-twining; tuber solitary, 4-lobed, or 4-5 in a cluster, each tuber depressed, globose, 10 cm Ø, near soil surface; plant usually pubescent when young (simple straight hairs, 0,2-0,8 mm long), becoming glabrescent; stem with stout prickles towards base brown, usually in leaf axils; leaves alternate, 3-foliolate; petiole to 27 cm long, pubescent, usually with very few scattered prickles; leaflets with petiolule to 1 cm long, densely pubescent when young; median leaflet obovoid, to 28x29 cm, acutely acuminate, base cuneate or rounded; male inflorescence often present when the plant is leafless, paniculate; ultimate inflorescences 0,6-2,6 cm long, ultimate branches spreading in all directions forming dense cylindrical spikelets to 2,5 cm long on peduncles to 1,5 cm long; capsule narrowly obovate to elliptic, 4,4-5,8x1,9-2,9 cm, glabrescent at maturity; seed with wing on basal side.
Ecologie : Sandy lake-shores; sandy ground in Brachystegia woodland; deciduous woodland with Adansonia digitata, Boswellia papyrifera; termite hills; near rock outcrops; persisting in abandoned cultivated places; forest margins; river valleys; edges of watercourses; rarely in heavily disturbed places; prefers well-drained sandy soils; 400-1900 m alt.
  Close to D. dumetorum, but more vigorous and with larger leaves and flowers.
  Tubers eaten as a famine food, but washing and drying necessary to remove toxic alkaloids which are used as arrow poison in Mozambique (Fl. Zambes., l.c.)
Afr. Austr.
Biol./Eco : perennial-Geophyte, Climber- Ht 2 - 12 m. Alt: 1000 - 1500 m. Distribution: NAM

Bibliographie pour l'Afrique Australe :
  • List South. African Succ. Pl. : 67 (1997).
 
Plus d'info sur :
voir d'autres informations sous Jstor_African Plant Initiative
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
 
Carte
carte afrique num 11202
 
Enregistrement n°11202 modifié le 2013-10-31
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