Epiphytic herbs with distinct rhizomes. Rhizomes rigid, ca. 3 mm in diam., with pseudobulbs arising 2-4 cm apart. Stems yellowish green, fleshy; pseudobulbous long cylindrical, 6-12 cm long, 5-8 mm in diam., narrowed at apex, dilated at base, lustrous. Leaves 2, terminal, at apex of stem, oblan-ceolate-linear, 10-15 cm long, 1-1.5 cm wide, apex acute, base cuneate, articulated with pseudobulb. Racemes terminal; peduncle and rachis ca. 10-20 cm long, nearly terete; bracts lanceolate, 3-5 mm long; pedicel and ovary 8 mm long. Flowers numerous, dense, pale green or nearly white, with strongly reflexed sepals and petals; sepals oblong, 3.5 mm long, 1 mm wide, obtuse at apex; petals linear, 3.5 mm long, 0.5 mm wide; lip ovate, 3-4 mm long, 2-2.5 mm wide, base erect, margins thick, incurved, recurved downward from middle, apex 2-lobed, apical margin minutely ciliate; disc with 2 pointed calli at base; column green, 2 mm long, more or less arcuate, apex inconspicuously winged, dilated at base; anther green, margin white at base; pollinia elongate ovoid, ca. 0.5 mm long.

TAIPEI: Tzechishan, Su & Chen 7418. KAOHSIUNG: Sanping, Lin s. n. Aug 1972. PINGTUNG: Luliaochi, Su 6843; Nanjenshan, Su 7551*. HUALIEN: Shuesui, Su 8116.

Widely distributed in the Philippines, Thailand, Sumatra, Java, Sulawesi, Papua New Guinea, and the Pacific islands. Taiwan, mainly in the east low elevations (100-500 meters).