African Plant Database


Disa walleri Rchb. f.
Family : ORCHIDACEAE
Information on the genus : Disa
 
 
Status
Status for TA : accepted (present)
 
Synonym(s) Heterotypic
=Disa leopoldii Kraenzl. p.p.
=Disa princeae Kraenzl. (1900)
=Disa zombaensis Rendle (1894)
 
Ecology and distribution
Trop. Afr.
Biology : Terrestrial herb 50-100 cm tall; tubers elongate-ovate, 2,5-5x2-2,5 cm; sterile stem 9-14 cm tall, covered by several overlapping red-spotted sheaths, 1-4 leaved at apex, with lanceolate acute leaves 15-32x2-5 cm; flowering stem robust, leafy throughout its length; leaves 11-14, erect, appressed to stem, lanceolate, acute, the largest 7-11x1,5-4,5 cm, decreasing in size upwards; inflorescence cylindrical, 10-30 cm long, 4-7 cm Ø, 6-30-flowered; flowers large, white to mauve, purple or magenta with darker spots; bracts leafy, lanceolate, 25-70 mm long; pedicel and ovary c. 20 mm long; dorsal sepal conical, 18-30x15-25 mm, hood 10-15 mm deep, with spur (with wide mouth) 10-17 mm long, curved downwards, ± club-shaped at apex; lateral sepals obliquely oblong, 16-22x5-10 mm, projecting; petals erect, inside hood, oblong-lanceolate, 13-18x1,5-5 mm; lip linear, 10-17x1-1,5 mm, projecting.
Ecology : Grassland, secondary grassland, often with scattered scrub or trees; Brachystegia woodland, in semi-shade in damp places; dambos; 1000-2300 m alt.
  Small-flowered forms easily confused with D. caffra.
  Not in Rwanda (Delepierre & Lebel in Taxonom. 5: 2, 2001).

Bibliography for Tropical Africa :
  • Exell, A. & Wild, H. (1995). Flora Zambesiaca: Mozambique, Federation of Rhodesia and Nyasaland, Bechuanaland Protectorate. London Kew 11[1]: 181

Bibliography for Southern Africa :
  • Wild Flrs Rhodesia : (1976).
 
More info on :
see under Jstor_African Plant Initiative
see under chg
see under Flore d'Afrique Centrale
see under African Plants - a Photo Guide
see under Flora of Zimbabwe
 
Map
More information >> ( work in progress )
 
Record n°43397
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