Plants erect, 30-40 cm tall. Rhizomes stout, terete, 5-10 mm thick, with 3-4 nodes, producing stems upward, densely rooting below. Stems yellowish, lustrous, compressed, highly branched, upper 2-3 internodes dilated into successively larger pseudobulbs. Pseudobulbs yellowish, clavate or fusiform, ancipital, 2-6 cm long, 1.5-2.5 cm wide, often shallowly furrowed in age. Leaves, ovate to oblong, 5-10 cm long, 2-3.5 cm wide, obtuse or rounded at apex, slightly narrowed at base into a short petiole, with parallel veins elevated on both surfaces. Racemes arising from leaf axial on apex of pseudobulb, about 1.5 cm long; bracts multiseriate, scale-like, ovate-lanceolate, 3-5 mm long; pedicel and ovary slender, 1.5 cm long. Flowers few, whitish, with yellow lip; dorsal sepal linear-lanceolate, 1.5-1.8 cm long, 3.5-4 mm wide, acute at apex, more or less concave at base; lateral sepals linear-falcate, as long as dorsal one, 4.5 mm wide, acute at apex, oblique at base, mentum ca. 4 mm long; petals linear, 1.5 cm long, 1.5 mm wide, acute to acuminate; lip obtriangular in outline, 1.5-1.8 cm long, enlarged upward from a narrow cuneate base, 3-lobed, lateral lobes ovate-triangular, 4 mm long, 1.5 mm wide, lacerate apically, midlobe obtriangular in outline, 10-12 mm long, about 10 mm wide at apex, dilated from a toothed base and deeply fimbriate from near base toward apex; column stout, semiterete, about 4 mm long, foot ca. 4 mm long; anther 1 mm tall; pollinia yellow, elongate ellipsoid, 0.8 mm long.

PINGTUNG: Manchow, Su et al. 7028; Nanjen Lake, Wang 756. TAITUNG: Tawu, Su 56*.

Widespreading in the Philippines, Malaysia, Indonesia, Australia, Papua New Guinea and the Pacific islands. Taiwan, at its northern limit, forests along the streams of Hengchun Peninsula.