African Plant Database


Dioscorea dregeana (Kunth) T. Durand & Schinz
Family : DIOSCOREACEAE
Protologue : Consp. Fl. Afr. 5: 274 (1894)
Information on the genus : Dioscorea
Basionym : Helmia dregeana Kunth
 
 
Status
Status for SA : accepted (present)
Status for TA : accepted (present)
 
Synonym(s) Homotypic
 Helmia dregeana Kunth (1850)
 
Synonym(s) Heterotypic
=*Dioscorea dregeana var. hutchinsonii Burkill
 
Ecology and distribution
Trop. Afr.
Biology : Herbaceous twining vine to 12 m long; tuber solitary, lobed, or main tuber with several smaller subsidiary ones in a dense cluster, 2,5-7 cm Ø; stems annual, left-twining, to 1 cm Ø, often with ridged ascending prickles, concentrated towards base, to 1,5 cm long; stems and inflorescences with sometimes dense, velutinous indumentum; leaves alternate, trifoliolate; anterior leaflet broadly ovate-elliptic, 4,3-18x2-15 cm, acute to obtuse, apiculate; male inflorescence compound; partial inflorescences with whole axis visible; flowers usually in 2-3-flowered cymules (sometimes 1 flower, occasionally 1 cymule); ultimate inflorescence branches lax; flowers sessile, 0,2-1 cm apart at anthesis; inner tepals 1,2-2,3x1-2,3 mm (outer 1,1-1,9x0,5-1,4 mm); female inflorescence spicate, to 14 cm long; capsule 3,8-5x1,8-2,7 cm; seeds winged at base.
Ecology : Watercourse margin; 400-1400 m alt. in S. Africa.
  Very near D. dumetorum and D. cochleariapiculata. Also near the Asian D. hispida Dennst.
  Medicinal plant, tubers used (S. Afric. J. Bot. 73: 131-137, 2007).
South. Afr.
Biol./Eco : perennial-Geophyte, Climber- Ht 1 - 12 m. Alt: 275 - 1400 m. Distribution: EC, KN, LP, MP, SWZ

Bibliography for Southern Africa :
  • Fl. Cap. (Thunberg) 6: 247 (1896). 
  • Mem. Bot. Surv. South Africa : 545 (1966).
  • List South. African Succ. Pl. : 67 (1997).
  • Wild Flrs north. South Africa : 82 (1997).
 
More info on :
see under Jstor_African Plant Initiative
see under The International Plant Name Index
 
Map
carte afrique num 11208
 
Record n°11208
Feedback about this record