Epiphytic herbs. Stem up to 3 cm long. Leaves 3–6, linear, often falcate. Inflorescence racemose, 2–4 cm long, 4–8-flowered; peduncle about same length as rachis; rachis flexuous; floral bracts minute. Flowers 5–6 mm long, resupinate, green heavily blotched purple, pleasantly scented, lasting for about two days. Sepals and petals free. Dorsal sepal ovate, concave, lateral sepals falcate-subovate, asymmetric, shortly clawed, obtuse. Petals falcate-subovate, asymmetric, acute. Labellum rigidly joined to base of column, saccate, spurred, trilobed, side lobes erect, incurved in front, sublunate, distally narrowly triangular or tooth-like, midlobe concave-deltoid, the walls thick, the thick floor produced backwards part way across and connate to sides of anterior section of spur entrance as a thick, downcurved, deeply bifid callus, with divergent arms; spur cylindrical, compressed anterior-posteriorly, without interior calli or septa. Column slender at base, dilated above, column foot absent, wings absent; pollinia four, in two closely appressed, subequal pairs, stipe lorate, viscidium set at an acute angle to stipe; stigma deeply set; rostellum downcurved, apex bifid.