Japan Flora: Slender herbaceous perennial from creeping knotty rhizomes 3-8 mm. in diameter; stems 30-60 cm. long, ascend ing above, weakly striate; leaves firm, narrowly oblong to broadly elliptic, short-petiolate, smooth, often glaucescent be- neath, thinly chartaceous; peduncles 1-2 cm. long, 1- to 3-flowered, horizontally spreading, the pedicels shorter than the common peduncle; flowers white, the tips greenish, 15-18 mm. long, sometimes with a very short stipe at the base. May-June. Thin woods, low mountains and hills;
Hokkaido, Honshu, Shikoku, Kyushu.
f. amabile (Yatabe) Makino. Leaves with purplish variegation.