Leafless achlorophyllose saprophytic herbs, with globose to narrowly cylindrical tubers. Stems erect, unbranched, slender, weakly flexuous. Inflorescences racemose, terminal, 1–many-flowered. Flowers small, fugacious, unspurred, yellow or brown. Tepals partially adnate, forming a short tube. Lip free, simple, with slender claw. Column elongated, scarcely widened at apex, arms and foot absent; anther declinate; pollinia 4; caudicle and viscid disc absent; stigma near apex of column. Pedicel lengthening considerably as erect capsule matures.
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