Japan Flora: Leaves oblong, 1.5-3 cm. long, 1-2.5 cm. wide, obtuse, acute to sub-rounded at base, the petioles 1.5-25 cm. long; scapes 8-15 cm. long, with 1 or 2 remote membranous sheathing scales 5니2 mm, long; racemes 1-4 cm. long; flowers 3-5, yellowish green, the bracts membranous, 1 mm. long, obtuse, toothed; sepals 4.5-5 mm. long, obtuse, 3-nerved; petals slightly shorter than the sepals, denticulate; lip 4-5 mm. long, 2-2.2 mm. wide, slightly involute and brownish purple on inner side at dp, denticulate; column 25 mm. long, flattened, cuneate-obovate, with an auriculate wing on each side; ovary about 3 mm. long. June. Woods in mountains;

Honshu (Hakone, Fuji, Chichibu, Yamato); very rare.