Platylepis polyadenia Rchb.f., Flora 68: 537 (1885).
Robust herbs, 25-40 cm long, rhizome spreading, fleshier than the stem; leaves very numerous, petiolate (petiole 2-3 cm long), elliptical or oblong-lanceolate (12-15 x 3-5 cm), acute; peduncle with several large sheaths, villous-glandular apically; inflorescence dense, oblong (3.4 x 1,5-2 cm); bracts widely, oval-acute (11-13 x 6-8 mm), hirsute-glandular, slightly shorter titan the flower, more than three times longer than wide; flowers 15-17 mm long (with the ovary). Hirsute-glandular on the pedicel and the external parts of the flower. Median sepal narrow, slightly gibbous basally, dilate (3 mm) above the center. Petals oblanceolate-linear (8-9 x 1,5 mm), very narrow in the lower three-fourths, obtuse and 1 veined labellum thick, verrucose exteriorly, adnate to the column for three fourths of its length, 5 veined, 7 mm long 3,5 mm wide in the apical third, bigibbous basally, the 2 humps very visible, spherical, each containing a large callus, and tipped with a small lobule, semi-circular, obtuse apically and l mm wide; basal ked projecting in front. Column thin, 7 mm tall. Anther acute, taller (3 mm) than the rostellum with the lamina deeply bifid, lobes to 1,5 mm long; staminodes in very obtuse lobules and slightly visible. Stigmas slightly projecting, elongated, recurving. Ovary hirsute-glandular, 7-8 mm long.

In humus and vegetation debris in forests, from 0-1200 m. alt.; flowering November-February.

Comoros, Madagascar