Herbs, terrestrial or rarely epiphytic. Rhizome creeping, cylindric, fleshy, noded, with several roots at nodes. Stem erect or decumbent, terete, with several to many subrosulate leaves. Leaves green to reddish purple, ovate to elliptic, slightly fleshy, with amplexicaul petiole-like bases. Inflorescence erect, pubescent, terminating in a short, many-flowered raceme. Flowers resupinate, small; ovary pubescent. Sepals abaxially hairy; dorsal sepal and petals adnate and forming a hood; lateral sepals free, spreading. Lip erect, entire or 3-lobed, adnate to column at base, spurred at base; spur tubular, protruding beyond base of lateral sepals, apex obtuse, unlobed or slightly 2-lobed, containing 2 clavate appendages or empty. Column short, apically dilated; anther erect, ovoid, 2-locular; pollinia 2, each ± longitudinally 2-parted, clavate, granular-farinaceous, sectile, attached to an ovate-lanceolate viscidium; rostellum erect, bifid; stigma lobes connate, below base of rostellum. Capsule fusiform.
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Terrestrial herbs with semi-basal or cauline leaves. Sepals free, nearly equal, erect or spreading. Petals connate toward their apices and usually coherent to the' dorsal sepal and with it forming a galea. Lip simple or lobed, slightly adnate to the column for a short way, extended into a simple or didymous spur at the base which usually contains four or more mammillate calli or callus-like structures at the base. Column short. Pollinia sectile or granular. A genus found in the tropics and subtropics of both hemispheres. The species are difficult to interpret.
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