Epiphytic, entirely glabrous herb. Stem usually abbreviated, erect Leaves iris-like, equitant, fleshy, with imbricate bases. Inflorescence an axillary open subumbellate raceme shorter than the leaves; bracts small, scarious. Flowers resupinate, narrow, medium-sized; ovary narrowly long-pedicellate. Sepals and petals free, spreading; petals slightly shorter. Lip orbicular, with a long, narrowly conical spur inflated and often bilobed at the apex. Column short, with a foot; rostellum narrow, bifid; anther terminal; pollinia 2, globose, each with a narrow stipes; viscidium solitary, relatively large.
Epiphytic psygmoid herbs. Roots basal. Stem leafy. Leaves fleshy, bilaterally flattened, arranged in a fan, linear-tapering, acute, articulated to basal, imbricate leaf sheaths. Inflorescence shorter than leaves, unbranched, many-flowered in heads; bracts triangular. Flowers resupinate, campanulate, pure white with a green anther, pedicel and ovary white. Sepals and petals free, subsimilar, elliptic. Labellum concave, fan-shaped, entire or obscurely trilobed, ecallose, spurred at base; spur pendent, clavate or tapering from a broader mouth. Column clavate; pollinia two, porate, each attached by a linear stipe (tegula) to an oblong viscidium; stigma circularoblong; rostellum porrect but upcurved and bifid at tip.