Base de données des plantes d'Afrique


Platycoryne buchananiana (Kraenzl.) Rolfe
Famille : ORCHIDACEAE
Protologue : Fl. Trop. Afr. [Oliver et al.] 7(2): 257 (1898)
Informations sur le genre : Platycoryne
Basionyme : Habenaria buchananiana Kraenzl.
 
 
Statut
Statut pour TA : accepté (présent)
 
Synonyme(s) homotypique(s)
 Habenaria buchananiana Kraenzl. (1894)
 
Synonyme(s) hétérotypique(s)
=Platycoryne kitondo (De Wild.) Summerh.
=Habenaria kitondo De Wild. (1902)
=Habenaria ipyanae Schltr. (1915)
=Habenaria stolzii Kraenzl. (1912)
=Habenaria kitimboana Kraenzl. (1914)
 
Ecologie et distribution
Afr. Trop.
Biologie : Terrestrial herb 20-65 cm tall, glabrous except for tubers; tuber 1, ovoid, 1,5-2,5x0,5-1,5 cm; leaves cauline, 5-9, spread, the lower ones ± spreading, lanceolate, 3-7x0,5-1 cm, upper ones bract-like; inflorescence to 5,5 cm long (a head), densely 4-20-flowered; flowers rather small, incl. ovary bright orange or yellow (2 colour forms), sometimes scented; bracts 10-20 mm long; pedicel and ovary 10-20 mm long; dorsal sepal broadly ovate, 5-9x4-7 mm; laterals reflexed, elliptic, 5-10x2-3 mm, apiculate; petals erect, lanceolate, 3,5-8x1-3 mm, adnate to dorsal sepal; lip entire, ligulate, fleshy, 5-10x1-2 mm, pendent and curving forwards; spur 10-20 mm long, apex ± swollen.
Ecologie : Poorly drained or wet or marshy grassland; dambo; in shallow soil over rocks; seepage slopes; 500-2000 m alt.
  Variable in size and colour of flowers.
  Note: Summerhayes in Kew Bull. 13: 63, 1958, remarks that Rolfe (Fl. Trop. Afr. 7: 257, 1898) included several species in his concept of P. buchananii, including P. pervillei, P. mediocris; this has caused difficulty for subsequent workers. – Piers, Orchids E. Afr., ed. 2: 53, 1968, treated P. buchananii as a synonym of P. crocea subsp. crocea (Kenya mostly). – Ball, Terrestr. Afric. orchids: 236-237, 2009, presents a mixed gathering from Zimbabwe, Umtali (Mutare), and Inyanga. They were tentatively listed under P. buchananiana. Plants previously referred to P. buchananiana from Mozambique are referable to P. pervillei.

Bibliographie pour l'Afrique Tropicale :
  • Exell, A. & Wild, H. (1995). Flora Zambesiaca: Mozambique, Federation of Rhodesia and Nyasaland, Bechuanaland Protectorate. London Kew 11[1]: 149
 
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Enregistrement n°44816 modifié le 2007-04-05
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