Japan Flora: Rhizomes ascending, brown, fibrous; leaves 20-40 cm. long, 1-2 cm. wide, acuminate, the midrib obscure; scapes 30-70 cm. long, branched, the bracts green, ensiform, the bracteoles broadly lanceolate, essentially membranous, sub- obtuse, 2—3 cm. long, the pedicels 3-4 cm. long; flowers blue­purple, about 8 cm. across, the perianth-tube short, the outer segments broadly obovate, the claw yellowkh with red-purple veins, the inner segmen任 much smaller, lanceolate, acuminate- setose; anthers purple, the stigma-appendage dentate. July-Aug. Bogs in mountains.

Honshu (centr. distr. and northw.), Hokkaido. Korea, Kuriles, Sakhalin, e. Siberia, and Aleu­tian Isis.