AFRICAN

ORCHIDS

Graphorkis medemiae (Schltr.) Summerh., Kew Bull. 8: 161 (1953).
Homotypic Synonyms:
Eulophia medemiae Schltr., Ann. Inst. Bot.-Géol. Colon. Marseille, III, 1: 173 (1913).
Eulophiopsis medemiae (Schltr.) Schltr., Beih. Bot. Centralbl. 33(2): 422 (1915).
Lissochilus medemiae (Schltr.) H.Perrier, in Fl. Madag. 49(2): 38 (1941).
Description:

Pseudobulbs very tightly compressed, ovoid-oblong (6 x 2 cm), grayish, aphyllous, the most recent enveloped by the white, fiberous, coriaceous sheaths, truncate with the spinulescent articulation, the new bulb developing prior to flowering. Leaves appearing 3 months prior to the flowers, falling an soon as the new bulb has matured, graminiform, very snarrow (6 mm at most) and very acute. Inflorescence thin, 25 cm long; peduncle short, with 2-3 small sheaths, panicle with 3-5 branches, loosely multi flowered, bracts small, acute, not more than one-tenth the length of the pedicel; flowers 2.5 cm long, sepals and petals brown with the labellum small. Sepals narrowly lanceolate, 9 mm long, slightly attenuate below the middle; petals nearly similar. Labellum (7 x 3.5 mm) compressed basally, trilobed to nearly the center, the lateral lobes small and obtuse, the median lobe much larger, widely elliptic and very obtuse, undulate-crenulate marginally; provided basally with 3 longitudinal keels, and on the median lobe with 6 small, short, diverging, lateral keels; spur very short, only slightly visible. Column small, 3.5 mm long. Pedicel 15 mm long.
Habitat:

Epiphytes on the trunks of Medemia nobilis; found in the savannahs with Medemia from 0-300 m alt.; flowering in August-September; December-March.
Distribution:

NW. Madagascar
Images:
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Botanical Drawing / Herbarium
graphorkis medemiae
Photograph copyright Swiss Orchid Foundation at the Herbarium Jany Renz Image used with kind permission.