Distribution: Both sides of the Cascades crest in Washington; Washington south to California, east to Alberta, Montana, Idaho, Nevada, and Colorado.
Habitat: Bogs, streambanks and wet meadows at mid-elevations in the mountains.
Growth Duration: Perennial
Conservation Status: Not of concern
Strong perennial from a short, woody base, the flowering stems leafless, 3-12 dm. tall, copiously glandular-pubescent above.
Leaves basal, 10-20 cm. long, contracted to a broadly-winged petiole, the blades elliptic-oblanceolate to ovate-lanceolate, entire or shallowly toothed, nearly glabrous, but with soft hairs on the petiole margins.
Inflorescence an elongate panicle, narrow to somewhat diffuse; calyx 2-3.5 mm. long, the 5 reflexed lobes oblong lanceolate; petals white to greenish-white, usually 5 but sometimes 1 or more lacking, often unequal in size, obovate to ovate-oblong, 2-4 mm. long and 1-2.5 broad; stamens 10, filaments broadly club-shaped, 1-2 mm. long, greenish-white to pinkish.
Ovary nearly superior in fruit; carpels 2-4.
PNW Herbaria: Specimen records of Micranthes oregana in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Micranthes oregana checklist entry.
OregonFlora: Micranthes oregana information.
E-Flora BC: Micranthes oregana atlas page.
CalPhotos: Micranthes oregana photos.
USDA Plants: Micranthes oregana information.