Description from Flora of China
Herbs, terrestrial or rarely epiphytic. Rhizome elongate or short, ascending, cylindric, fleshy, with nodes bearing several slender roots. Stem erect or ascending, leafy. Leaves ovate, slightly fleshy, with a short petiole-like base sheathing stem. Inflorescence erect, terminal, racemose, densely several to many flowered. Flowers resupinate, not fully opening, medium-sized or small; ovary twisted, cylindric-fusiform, pubescent. Sepals subequal; dorsal sepal and petals forming a hood; lateral sepals free, spreading. Lip short, triangular-ovate, obscurely 3-lobed, spurred at base; spur conic to fusiform, large, projecting between base of lateral sepals, containing 2 stalked glands near base. Column very short, stout; anther erect, on dorsal side of column, 2-locular; pollinia 2, granular-farinaceous, narrowly obovoid, attenuate at base, attached to a large ovate-oblong viscidium; rostellum short, erect, remnant shortly bifid; stigma 2-lobed; lobes separate, raised, protruding beyond sides of rostellum.
About 35 species: India to the Pacific islands; one species in China.
(Authors: Chen Xinqi (陈心启 Chen Sing-chi); Stephan W. Gale, Phillip J. Cribb)