A terrestrial herb 3–4 dm. high, glabrous.. Stem erect, somewhat flexuous, with a single leaf at the base and numerous sheaths along its length.. Leaf adpressed to the ground, broadly ovate or reniform, 3–4 cm. long, 5 cm. broad; sheaths triangular, acuminate.. Inflorescence 12 cm. long, loosely several-flowered.. Bracts lanceolate, acuminate, scarcely as long as the pedicel.. Flowers green; pedicel with ovary 2.5–3 cm. long.. Dorsal sepal oblong-lanceolate, acute, convex, 4 mm. long, 3–4 mm. broad; laterals refiexed, ovate, obtuse, 5–6 mm. long, 3–4 mm. broad.. Petals bipartite nearly to the base; posterior (upper) lobe erect, lanceolate, hidden beneath the dorsal sepal, 2–3 mm. long; anterior lobe curved upwards, linear-lanceolate, acute, 10 mm. long.. Lip tripartite nearly to the base; lobes lanceolate, acute, equal, 7–8 mm. long.. Spur incurved, narrow at base, swollen in apical part, 2 cm. long.. Anther rather tall, canals arising from the middle of the column and rather long.. Stigmas deflexed, surrounding the mouth of the spur.
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