Terrestrial herbs. Pseudobulbs arising from rhizome at 3-5 cm intervals, ovoid, ca. 1.5 cm long. Leaves 2, ovate or cordate, 5-10 cm long, 4-8 cm wide, apex acute, base rounded or cordate, thinly membranaceous; petioles nearly as long as blade. Peduncle more or less ridged, 10-20 cm long; bracts lanceolate, 3-5 mm long; pedicel and ovary 6-7 mm long. Flowers ca. 15, pale green, sometimes tinged with purple, or purple throughout, ca. 1 cm in diam.; dorsal sepal linear-oblong, 7 mm long, 1.5-2 mm wide, acute; lateral sepals similar to dorsal sepal, often positioned under lip, free or sometimes connate at base; petals linear, 6 mm long, 0.8-1 mm wide, strongly revolute; lip orbicular-ovate, 6 mm long, 5 mm wide, entire, apex rounded or slightly apiculate, disc with 2 small triangular calli near base; column 5 mm long, slender, recurved at apex, dilated at base.

TAIPEI: North Chiatienshan, Lin 59. ILAN: Taipingshan, Suzuki s. n. Aug 1928. NANTOU: Tungpushan, Su 8354; Tatachia, Su 9086. HUALIEN: Shiaohsingshan, Su 2003.

Japan. Taiwan, forests at 1,000-2,000 m in the north and center.