Japan Flora: Gla­brous; leaves linear, slightly arcuate, 10-25 cm. long, 5-10 mm. wide, long-acuminate, smooth, few-nerved; scapes erect, 20-50 cm. long, with few short green linear-lanceolate leaves; ra­cemes 6-12 cm. long, rather many-flowered, glabrous, smooth, the bracts linear, usually slightly shorter than the pedicels; pedicels ascending, 7-15 mm. long, with a linear bracteole near the middle; tepals spreading, yellow in anthesis, erect and green in fruit, subacute, 8-10 mm. long, linear; anthers pale yellow, the filaments white-villous; capsules lanceolate, acumi­nate, 12-15 mm. long, about 2.5 mm. wide; seeds lanceolate, about 2 mm. long, the caudate tails about 10 mm. long. July-Aug. Bogs, wet rocks, and moist places along streams in mountains.

Hokkaido (Horomui), Honshu (n. to centr. distr. and Ise Prov.)