Gastrodia madagascariensis Schltr. ex H.Perrier, Repert. Spec. Nov. Regni Veg. Beih. 33: 123 (1924).
Didymoplexis madagascariensis (Schltr. ex H.Perrier) Summerh., Kew Bull. 8: 131 (1953).
Herbaceous plants, 20-40 cm tall, entirely white, except for the base of the scape and the capsules which are brownish; rhizome thick, blackish, horizontal, 3-5 cm long, covered with reddish-brown hairs, scape 11-18 cm tall, 2-6 mm in diameter, with 3-4 internodes and as many short, thin sheaths, raceme 4- lowered; rachis 3-10 cm long; bracts lanceolate-acute, 6-8 mm long. Flowers ?; pedicels fructiferous, s much as 30-40 cm long and 2-3 mm in diameter. Capsule oblong (25 x 5 mm).
Terrestrial; in eastern forests, from 2000 m alt.; flowering in September.