Distribution: Occurring west of the Cascades crest in Washington; lowland western Washington to Willamette Valley, Oregon.
Habitat: Moist forests, oak-ash woodlands, thickets, and fields at low elevations.
Conservation Status: Sensitive in Washington (WANHP)
Glabrous, scapose perennials from thick, brown rhizomes, the 1-3 terete scapes 1.7-3 dm. tall.
Leaves sessile in a whorl of 3, the blade green with obscure mottling, ovate to broadly ovate, 6.5-16 cm. long and 5-8 cm. wide, not glossy, the tip obtuse.
Flowers solitary and terminal on the scape; sepals 3, green, spreading, lanceolate, 16-25 mm. long and 4-8 mm. wide, entire; petals erect, concealing the stamens and ovary, white, linear to linear-lanceolate, 2.2 cm. long and 0.4-1 cm. wide, entire, the tip obtuse; stamens 6, erect, 10-15 mm. long, the filaments white or purplish-tinged; ovary superior, 3-celled; stigmas 3, erect, green, the outer surface purple.
Capsule sub-globose, maroon, 4-8 mm. long.