African Plant Database


Disperis johnstonii Rchb. f. ex Rolfe
Family : ORCHIDACEAE
Protologue : Fl. Trop. Afr. [Oliver et al.] 7(2): 291 (1898)
Information on the genus : Disperis
 
 
Status
Status for SA : accepted (present)
Status for TA : accepted (present)
 
Synonym(s) Heterotypic
=Disperis stolzii Schltr. (1915)
=Disperis szolc-rogozinskiana Szlach. & Kowalk.
 
Ecology and distribution
Trop. Afr.
Biology : Terrestrial herb 4-15 cm tall; tuber ± globose, 0,4-1 cm long and wide; leaves cauline, alternate, sessile, ovate-lanceolate, 8-3x0,5-2,2 cm, papillose, green with silvery venation above, purplish beneath; inflorescence 2-6-flowered; flowers white and pale purple or pink, lip and hood yellow; bracts ovate-lanceolate, 3-11x1-7 mm; pedicel and ovary 10-12 mm long; dorsal sepal flat, joined to petals to form an open concave hood 7-12 mm long, 7-10 mm wide; lateral sepals obliquely ovate, 7-14x4-6 mm, united in lower 1/3, each with a sac 0,5-1 mm long; petals falcate, 10x2-3 mm; lip 4-6,5 mm long, with narrow claw sharply bent back on itself near base and there bearing a 2-lobed appendage with papillose lobes, the claw ending in a ± round blade with a high keel in centre.
Ecology : Brachystegia and Uapaca woodland; forest patches; in rich humus or sandy soil in grassy places under trees or among grass in woodland; often associated with rocks and their shelter; marshy places; with mosses in eroded gully on red soil; in semi-shade in open grassland under palms and Acacia trees; 500-2000 m alt.
  Closely related to D. togoensis.
  S. Africa: E coast. – Also in Zaire and Congo-Brazzaville ? Not in Fl. Afr. Centr., Orchid. 1, 1984.
South. Afr.
Biol./Eco : perennial-Herb, Geophyte- Ht 0.045 - 0.15 m. Alt: 50 - 600 m. Distribution: KN

Bibliography for Southern Africa :
  • Fl. Pl. Africa 45: t.1828 (1979).
  • Orchids of Southern Africa : 302 (1999).
  • Adansonia, sér. 3 27[2]: 173 (2005). 

Bibliography other :
  • Boudet G. & J.P. Lebrun (1986). Catalogue des plantes vasculaires du Mali. Etudes et Synthèses IEMVT 16
 
More info on :
see under Jstor_African Plant Initiative
see under Flore d'Afrique Centrale
see under Orchidées d'Afrique Centrale
see under Flora of Zimbabwe
 
Map
carte afrique num 46480
 
Record n°46480 modified 2006-05-30
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