Distribution: Occurring west of the Cascades crest along the coast in Washington; British Columbia to Oregon and Idaho; native and abundant in central and eastern North America.

Habitat: Cultivated cranberry bogs, and swamps.

Flowers: June-August

Origin: Introduced from eastern North America

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, flies

Erect, glabrous herb from rhizomes, the flowering stems 2-9 dm. tall.

Lower leaves sessile and clasping, 5-15 mm. long; upper leaves opposite, petiolate, the blades linear-lanceolate to narrowly elliptic, 3-8 cm. long; sterile shoots often with bulblets in the leaf axils.

Flowers in terminal, leafy, bracteate, simple racemes, the lower flowers often whorled; pedicels slender, 1-2 cm. long; calyx lobes 5, united only at the base, lanceolate, 2-4 mm. long; corolla divided nearly to the base, rotate, yellow, with purplish-black streaks and spots, the 5 lobes oblong-lanceolate, 6-8 mm. long; stamens 5, exerted, opposite the corolla lobes; filaments 3 mm. long. united at the base.

Capsule opening by 5 valves.