Japan Flora: Plants stout, erect, 50-150 cm. high, leafy, papillose-hairy above; leaves elliptic, acute to obtuse, 15-30 cm. long, 5-13 cm. wide, usually glabres- cent; panicles 25-40 cm. long, the ultimate bracts 6-10 mm. long, ovate, the pedicels 1-2(-3) mm. long; flowers 8-12(-15) mm. in diameter, the tepals oblong-lanceolate, subacute, 8-12 mm. long, 2-4 mm. wide, denticulate, green; capsules ovate, narrowed above. June-Aug. Bogs; Hokkaido. Kamchatka, Ussuri, Dahuria, and Sakhalin.