Japan Flora: Perennial with long-creeping rhi­zomes; stems erect, terete, simple or sometimes sparsely branched, 30-60 cm. long, with reduced scalelike leaves at base; leaves opposite, oblanceolate or broadly so, 4-10 cm. long, L5-2.5 cm. wide, obtuse or subobtuse, entire, sessile, glabrous and green, paler and long brownish tomentose be­neath, black-spotted; racemes spikelike, densely many-flowered, axillary midway on the stems, the peduncles 2-3 cm. long, erect; corolla yellow, the lobes broadly linear-oblanceolate, 4-5 mm. long, obtuse, with few black spots on upper part; capsules globose, black-spottcd, about 25 mm. in diameter, the persist­ent style about 4 mm. long.  May-July. Bogs and wet places.

Hokkaido, Honshu (Hitachi, Kotsuke, Shimotsuke, Echizen, and northxv.). Kuriles, Sakhalin, Korea, and cooler parts of the N. Hemisphere.