Base de données des plantes d'Afrique


Dioscorea sagittifolia 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 sagittifolia Pax var. sagittifolia (1892)
 
Taxons infra-spécifiques
Dioscorea sagittifolia Pax var. sagittifolia (1892)
Dioscorea sagittifolia var. lecardii (De Wild.) Nkounkou (1993)
 
Ecologie et distribution
Afr. Trop.
Biologie : Climber unarmed, glabrous, right-twining, 4-8 m long; tuber replaced annually, descending vertically, protected by thorny roots; leaves opposite or occasionally alternate, glabrous, stipules absent; petiole to 2,5-4 cm long; blade ovate-lanceolate or more usually deltoid, with basal corners sometimes auriculate, rounded or very obscurely cordate at base, to 9-11x2,5-5 cm, apex acute; inflorescences glabrous; male: 1-4 spikes, simple, in leaf axils; female: 1-2 spikes, 15-20 cm long, in leaf axils; capsule not glaucous, to 4 cm Ø; seed winged all round.
Ecologie : Quartzite hills; edges of thickets and forests; rocky outcrops; sometimes climbing among tall grasses; open forest with Trichilia dregeana; grassy to wooded savannas; clearings in rain-forest; sand; gallery; inundated places; 200-1800 m alt.
  Sometimes confused with D. praehensilis, D. abyssinica, D. cayenensis (see above under D. praehensilis).
 
Plus d'info sur :
voir d'autres informations sous Jstor_African Plant Initiative
 
Carte
carte afrique num 174993
 
Enregistrement n°174993
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