Epiphytic herbs. Roots toward base. Stem leafy, covered by distichous leaf-bases. Leaves coriaceous, linear, unequally bilobed at tip. Inflorescence suberect, elongate, many-flowered; rachis with flowers arranged distichously in two rows with labellum and spur pointing outward; bracts sheathing rachis. Flowers resupinate, sparsely hairy, white sometimes with minute red spots toward base and with a red spur. Dorsal sepal erect to reflexed, spatulateobovate, apiculate; lateral sepals recurved, ovate, keeled on back. Petals obliquely triangular. Labellum oblong, ecallose, spurred at base; spur clavate. Column upcurved, distally dilated; anther semicircular, pollinia two, slightly cleft, each attached by a broadly spatulate stipe to a common, reniform viscidium; stigma subcircular.
in Bot. Zeit. 10: 930 (1852); F.T.A. 7: 150, partly.