Japan Flora: Pseudobulbs short, fusiform-ovate, 1-2 cm. long; leaves 2, broadly ovate to orbicular-ovate, 5-10 cm. long, 3- 7 cm. wide, abruptly acute, rounded to cordate at base, the sheaths 2-7 cm. long; peduncles 15-30 cm. long, erect; racemes 3-7 cm. long; bracts lanceolate, ascending, acuminate, 1.5-2.5 mm. long; flowers whitish; sepals linear-oblong, 5-6 mm. long, acute, the lateral ones spreading; petals linear, slightly broadened at tip, obtuse, about 5 mm. long; lip cuneate-obovate, about 5 mm. long, rounded at apex, nearly straight, with 2 callosities at base; column about 3.5 mm. long, narrowly winged. July-Aug. Woods;

Honshu, Shikoku, Kyushu; rather rare.