Pendent epiphytic herbs. Stem leafy, obscured by persistent leaf bases, producing roots at the nodes. Leaves oblong or oblongelliptic, apex obtuse and asymmetric, coriaceous. Inflorescence lateral, racemose, occasionally branched, pendent, much longer than leaves, up to about 25-flowered, usually only five or six open at a time, progressing downward in succession, sometimes opening in middle of raceme; floral bracts minute, ovate. Flowers resupinate, short-lived, each lasting one day only, sepals and petals semi-translucent pale yellow to yellowish green, margins and tips semi-translucent whitish, labellum white with pale to dark purple spots, side lobes flushed purple on inner surface, spur pale yellow. Sepals and petals free, oblong-elliptic, obtuse, spreading. Labellum rigidly attached to column base, trilobed, spurred, ecallose, side lobes auriculate, midlobe longer than side lobes and resembling a sponge-like pouch, hollow near mouth of spur, solid below, shallowly concave on underside, papillose-verrucose; spur 2 mm long, conical, obtuse, aseptate. Column without foot; anther cap terminal, operculate, apex acuminate, sometime obscurely tridentate, pollinia two, ovoid, entire, stipe spatulate, broadened below pollinia, viscidium cucullate; rostellum prominent. Ovary with pedicel terete, straight.