Japan Flora: Slender glabrous perennial with creeping rhizomes; leaves solitary, broadly ovate, flat, 1.5-3 cm. long, 1-2.5 cm. wide, obtuse, rounded to subcordate at base, the petioles 2-5 cm. long; scapes slender, 10-20 cm. long, with 2 sheathing scalelike leaves in lower part; racemes 1-3 cm. long, loosely 2- to 7-flowered, the bracts membranous, about 1 mm. long; flowers horizontally spreading or nodding, yellowish green; sepals narrowly oblong, about 5 mm. long, obtuse, 3-nerved; petals slightly shorter than the sepals; lip short- clawed at base, abrupdy dilated above, the limb about as long as the sepals, flat, entire, oblong-ovate, slightly recurved, with a fleshy, callose protuberance on each side at base; column about 2/3 as long as the sepals; ovary pedicelled; capsules pendulous, clavate-fusiform, 8-10 mm. long. July-Aug. Mossy places in coniferous woods in mountains;

Hokkaido, Honshu (centr. and n. distr.). Sakhalin, and s. Kuriles.