African Plant Database

Dioscorea sansibarensis Pax
Protologue : Bot. Jahrb. Syst. 15: 146 (1892)
Information on the genus : Dioscorea
Status for MA : accepted (naturalised)
Status for TA : accepted (present)
Synonym(s) Heterotypic
=Dioscorea macabiha Jum. & H. Perrier (1909)
=Dioscorea macroura Harms (1897)
=Dioscorea welwitschii Rendle (1899)
=Dioscorea toxicaria Bojer (1837)
Ecology and distribution
Trop. Afr.
Biology : Glabrous non-spiny climber to 25-30 m long, stems left-twining, often with axillary bulbils to 5,5 cm Ø often glossy and black, or green (immature) or brown; tuber solitary, perennial, becoming very large with age, depressed globose, flattened below, developing roundish lobes with age, to 50 cm Ø and 22-30 kg in weight; leaves usually opposite; petiole 8-26 cm long; blade heart-shaped, to 20-46x23-58 cm, apex abruptly acuminate 5-20 cm long; blades of young plants variously shaped and lobed; inflorescences pendulous, spicate; male: 1-2 per leaf-axil or forming a terminal leafless panicle; spikes to 50 cm long; capsule glaucous, elongated, 2,5-5 cm x1-2,5 cm Ø; seeds winged at both ends.
Ecology : Fallows; termite mounds; secondary forests; forests sometimes flooded, with Lannea, Pseudospondias; dry forests and thickets; rain-forest; riverine forest; Acacia woodland; coastal evergreen bushland; often close to water; 0-900 m alt.
  The leaves with glands filled with a fluid holding nitrifying bacteria (Burkill, l.c.). The whole plant is very toxic (Choo in Gardenwise 32: 17, 2009).
  S. Tomé; Madagascar, Mauritius (fide Fl. Mascareignes 182, Dioscor.: 2-3, 1978). – In Zimbabwe only in the Zambezi valley. Newly naturalised in Taiwan (Collection Res. 25: 25-29, 2012).
Biol./Eco : Vine, Geophyte; distribution: Comoros, Africa,

Bibliography for Tropical Africa :
  • Kew Bull. 67: 66 (2012)
  • Darbyshire, I. Kordofami, M. & al. (2015). The plants of Sudan and South Sudan, An annoted checklist. Kew Publishing
More info on :
see under Jstor_African Plant Initiative
see under Fgui
see under The International Plant Name Index
see under Catalogue de Madagascar
see under Flora of Mozambique
see under African Plants - a Photo Guide
see under Missouri Botanical Garden
see under Flora of Zimbabwe
More information >> ( work in progress )
Record n°11277
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