Epiphytic herbs. Stem up to 4 cm long, but usually much shorter. Leaves 2–6, linear, acute. Inflorescence racemose, 1–4 cm long, 3–8-flowered; peduncle and rachis equal. Flowers 5–7 mm across, resupinate, green, sometimes marked purplish brown or crimson, labellum white, green or greenish yellow, strongly fragrant, lasting longer than one day. Dorsal sepal free. Lateral sepals adnate to base of column foot, falcate-oblong. Petals falcate- linear. Labellum rigidly joined to apex of column foot, trilobed, spurred; disc papillose, the papillae extending into spur, side lobes crescent-shaped, free portion spreading, subdeltoid, obtuse, midlobe decurved, bifid or emarginate; spur 2.0–2.5 mm long, dilated in proximal half with distal half cylindrical when viewed from the front, obtuse to almost truncate, posterior wall formed by column foot, ecallose, anterior wall papillose near mouth. Column 1.5 mm long, erect, not winged, column foot in line with column, 2.0–2.5 mm long; anther cap reniform, with a rostrum deflexed at a right angle, pollinia four, obovoid, in two closely appressed, subequal pairs, stipe about 1. times as long as pollinia, slightly dilated near apex, curling and twisting after removal from rostellum, viscidium ovate; stigma deeply set, rostellum decurved.