Base de données des plantes d'Afrique


Dioscorea preussii Pax
Famille : DIOSCOREACEAE
Protologue : Bot. Jahrb. Syst. 15: 147 (1892)
Informations sur le genre : Dioscorea
 
 
Statut
Statut pour TA : accepté, NF (présent)
 
Synonyme(s) homotypique(s)
 Dioscorea preussii Pax subsp. preussii (1892)
 
Synonyme(s) hétérotypique(s)
=Dioscorea andongensis Rendle (1899)
=Dioscorea chevalieri De Wild. (1914)
=Dioscorea dawei De Wild. (1914)
=Dioscorea longispicata De Wild. & T. Durand (1913)
=Dioscorea malchairii De Wild.
=Dioscorea pterocaulon De Wild. & T. Durand (1899)
=Dioscorea thonneri De Wild. & T. Durand (1899)
 
Taxons infra-spécifiques
Dioscorea preussii Pax subsp. preussii (1892)
Dioscorea preussii subsp. hylophila (Harms) Wilkin
 
Ecologie et distribution
Afr. Trop.
Biologie : Robust non-spiny climber, left-twining, to 10-24 m long; tuber annual, deep-buried, cylindrical, to 40 cm long, with thickened horizontal branches to 30 cm long, 3,5 cm Ø; stems often 6-winged, subglabrous, with a few, ± caducous T-shaped hairs; leaves alternate; petiole to 15-25 cm long; blade heart-shaped, to 12-28x15-30 cm, apex with acute acumen 1-2 cm long, with dense to sparse woolly-medifixed hairs; inflorescences pendulous, racemose; male to 5 in leaf-axils, to 22 cm long; female inflorescence spicate, axillary, to 34 cm long; flowers solitary, directed downwards; capsule oblong, with a narrow wing along each suture, 4-5,5x2,3 cm Ø; seeds winged at both ends.
Ecologie : Rain-forest; Acacia zygia woodland; secondary bushland; farmbush; riverine vegetation; forest edges; degraded forests; clearings; regrowths; palm woods; woods among huge rocks; secondary transitional forest with Harungana madagascariensis; 50-1700 m alt.

Bibliographie pour l'Afrique Tropicale :
  • Darbyshire, I. Kordofami, M. & al. (2015). The plants of Sudan and south Sudan, An annoted checklist. Kew Publishing
 
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
 
Carte
carte afrique num 174996
 
Enregistrement n°174996 modifié le 2007-04-02
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