Inflorescences 1.5-5 dm; bracts white, thin, 0.5-3 × 0.2-0.9 cm. Flowers: sepals 4-7 × 1-1.5 mm; petals elliptic to orbiculate, concave, 3-6 × 2-4 mm, base not saccate, margins irregular to lacerate; stamens inverted at anthesis, depressed-ovoid, 3-5 mm; anthers 1-1.5 mm diam.; ovary 2-4 × 3-5 mm, glabrous; style 0.5-2 × 1-1.5 mm; stigma 1.5-2.5 mm diam., apex slightly depressed. Capsules 5-segmented, 4-7 × 6-8 mm. Seeds 0.5-1.2 mm. 2n = 26.

Flowering late spring-summer. Moist, mixed-deciduous or coniferous forests; 70-3100 m; B.C.; Calif., Idaho, Mont., Nev., Oreg., Wash.