AFRICAN

ORCHIDS

Satyrium buchananii Schltr., Bot. Jahrb. Syst. 24: 422 (1897).
Heterotypic Synonyms:
Satyrium longissimum Rolfe in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 7: 267 (1898).
Satyrium nyassense Kraenzl., Bot. Jahrb. Syst. 28: 178 (1900).
Satyrium stolzianum Kraenzl., Bot. Jahrb. Syst. 33: 57 (1902).
Satyrium kassnerianum Kraenzl., Bot. Jahrb. Syst. 51: 381 (1914).
Description:
A terrestrial herb 2.5-6 dm. high, for the most part glabrous; tubers ellipsoid, ovoid or elongate-ovoid, 1.5-4 cm. long, 1-2 cm. in diameter, ± tomentose; roots slender, flexuous, sparsely pubescent. Sterile stem up to 7 cm. long, 3-5-leaved; lowest 2-3 leaves sheath-like, subacute or obtuse, the upper 1-2 lanceolate to narrowly lanceolate-elliptical, sometimes with a distinct narrow stalk, up to 7-20 cm. long and 1.5-3.7 cm. broad. Fertile stem slender to rather stout, partly covered by sheathing leaves; sheaths 5-9, lanceolate or oblanceolate, acute, up to 3.5-8 cm. long and 1-3 cm. broad, decreasing in size upwards. Inflorescence ± cylindrical, 6-15 cm. long, 3.5-5 cm. in diameter, rather loosely 7-15(-20)-flowered; bracts soon reflexed, lanceolate to broadly lanceolate, acute, 1.5-4 cm. long. Flowers curved outwards, white, rarely spotted mauve, apex of spur green, fragrant; pedicel with ovary curved, 1-1.5 cm. long, sometimes with small red spots. Sepals and petals deflexed, united to one another and to the lip in their basal fourth or fifth; intermediate sepal oblong-elliptical, rounded at apex, 10-13 mm. long, ± 3 mm. broad; laterals obliquely elliptical-oblong, rounded, 10-15 mm. long, 2.5-5 mm. broad. Petals similar to the intermediate sepal but a little broader, apical margins ciliolate to almost shortly lacerate; all tepals 3-veined. Lip very convex and hooded with the apex shortly recurved, hairy inside towards the apex, 10-15.5 mm. long and about the same in breadth when spread out; spurs often diverging markedly from the pedicels, very slender, 4-7 cm. long, scarcely 2 mm. in diameter. Column erect, 7.5-10 mm. high, the somewhat curved stalk a little longer than the fertile part; anther-loculi pendent, ellipsoid; stigma erect, transversely elliptical and slightly emarginate, 2-4 mm. tall, 4-6 mm. broad, rostellum porrect, ± 3 mm. long, 3-lobed, the side lobes short, triangular, the middle lobe much longer, broadly spoon-shaped from a narrow base, the apex upcurved.
Habitat:
Wet montane grasslands, dambos, damp and swampy areas. Alt. 1000-2400 m.
Flowering time:
October-March.
Cultivation:
As given for the genus, cool to cold growing terrestrial.
Distribution:
The Democratic Republic of Congo (Zaire), Tanzania, Angola, Zambia, Malawi, Zimbabwe.
References:
Orchidaceae of West-central Africa, vol. 1, Gdansk University Press Gdansk 2010; Flora of Tropical East Africa Part 1 Summerhayes 1968; The Orchids of South-Central Africa Williamson 1977; Flora Zambesiaca Vol. 11 Part 1 Pope 1995
Images:
Click on each image to see a larger version.

Habitat/In situ  Habitat/In situ 
Satyrium buchananii  01  Satyrium buchananii  02 
Photograph© Nicholas
Case Wightman Image
used with kind
permission.
 
Photograph© Nicholas Case
Wightman Image used with kind
permission.