Bulbophyllum francoisii var. andrangense (H.Perrier) Bosser, Adansonia, n.s., 5: 384 (1965).
Homotypic Synonyms:
Bulbophyllum andrangense H.Perrier, Notul. Syst. (Paris) 8: 39 (1939).
Description:
Plants 10-12cm. tall; rhizome 2-2.5mm. in diameter; pseudobulbs cylindro-connical (18-25 x5-6mm. when dried), bifoliate, 2-3cm. apart. Leaves narrowly oblanceolate (7-9.5cm. x 7-1 Imm.), much wider in the apical third, from this point gradually attenuate toward the acute apex and the shortly (2-3mm.) petiol-ate base. Inflorescence short, not or only slightly longer than the leaves; peduncle 15-22mm. long, to the top of the pseudobulb at most in length, covered nearly entirely by the 4-5 slightly loose sheaths; rachis several flowered (4-5), 15-20mm. long, flowers loosely arranged, 2-4mm. apart, irregularly curved-undulate, not thicker than the apex of the peduncle; bracts acute, 3-4mm. long, flat and in a straight angle; flowers 10-1 Imm. long. Sepals oval-triangular (8-10 x 4.5-5.5mm.), acute, 7 veined, the laterals slightly wider than the median and more acute. Petals glabrous, oblong-obtuse (2 x 1.5mm.) and 3 veined. Labellum very curved, semi-circular (flattened 6 x 1.5mm.), provided basally with wide, rounded auricles, deeply canaliculate above, then depressed at the obtuse apex, 3 veined, obvious and darker, the laterals branched toward the outer edges. Column very short (lm.), thicker; stelides narrowly triangular-acute, longer (1.2mm.) than the column; lateral margins of the stigma straight; with a small erect lobule on the front margin of the stigma; foot very long (4.2mm.), with the flat part longer than the upright part, which is trilobed apically. Anther 1mm. wide, provided behind with a small, brownish giddosite. Pedicel obconnical, 1mm. tall.
Habitat:
In very shady forests, from 1200-1400m. alt.
Phenology:
Flowering in October.
Distribution:
E. Madagascar
References:
BOSSER, Jean: Contribution a l'étude des Orchidaceae de Madagascar V 1965; Flora of Madagascar: vascular plants: 49th family, Orchids / by H. Perrier de La Bathie; published under the auspices of the government of Madagascar and under the direction of H. Humbert; English revision and translation by Steven D. Beckman; POWO (2022). "Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://www.plantsoftheworldonline.org/ Retrieved 14 December 2022."
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