Japan Flora: Rhizomes creeping, slender; leaves solitary, radical, ovate, 3-6 cm. long, 3-4 cm. wide， subobtuse, obtuse to rounded at base, petiolate; scapes 10-20 cm. long, witli 2 or 3 short sheaths on lower half; flowers solitary, the bracts thinly membranous, quadrangular-elliptic to ovate, 2-3 mm. long; sepals and petals pale green, oblanceolate to linear-lanceolate, 2-2.5 cm. long, subobtuse, ascending, 3-ncrved; lip erect, ovate, cuneate, 3-lobed, the lateral lobes broadly ovate, 2-3 mm. long and nearly as broad, obtuse, purplish on upper half, the terminal lobe obovate-rounded, recurved, about 7 mm. long and as wide, white with purple spots, more or less undulate on the margins, with 2 short ribs near the base; spur absent; column about 10 mm. long, flat, narrowly cuneate-oblong, rather broadly winged; ovary 3- angled; capsules clavate-fusiform, short-pedicelled, about 2 cm. long, ascending. May-July. Woods in mountains;

Hokkaido, Honshu, Shikoku.