Epiphytic herbs up to about 1 m. tall. Stems slender to rather coarse, covered with the amplexicaul leaf-sheaths, usually ancipitous. Leaves 4-25 cm. long and 1-5 cm. broad, ligulate to elliptic-lanceolate, acute or obtuse, those at the middle of the stem or above usually largest, the lower ones reduced. Inflorescence usually long-pedunculate (up to 45 cm.), simple or branched, racemose or subcapitate; peduncle ancipitous, covered with scarious sheaths. Dorsal sepal 5-10 mm. long and 2-3.5 mm. broad, elliptic to elliptic-ovate, acute or obtuse. Lateral sepals 6-10 mm. long and 2-4 mm. broad, oblong-lanceolate to ovate, obtuse or acute, oblique, semi-cochleate. Petals 4-9 mm. long and 0.5-1.5 mm. broad, filiform to linear-oblanceolate. Lip unguiculate; claw adnate to the column; lamina 3-6 mm. long and 4-7.5 mm. broad, reniform to cordate-suborbicular, 3-lobed; the lateral lobes rounded, fleshy; terminal lobe subquadrate to oblong, entire, retuse or doubly retuse; disc fleshy, usually with a low longitudinal callus from base to apex.
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