Page authors: Ben Legler, David Giblin
Micranthes integrifolia
Columbian saxifrage, swamp saxifrage, whole-leaf saxifrage

Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California.

Habitat: Prairies, grassy slopes and vernally moist areas, sea level to subalpine.

Flowers: March-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, flies, beetles, wasps


Pubescent perennial from a rhizome, the leafless flowering stems mostly single, 1-3 dm. tall.


Leaves all basal, the blades 2-5 cm. long, narrowly rhombic to rhombic-ovate, narrowed gradually to broad petioles rarely as long, with prominent marginal hairs and rusty-woolly on the lower surface.


Inflorescence thyrsoid, (15-)20+-flowered, open to ± congested, conic (usually branched) subtended by a leafy, rusty-woolly bract; calyx broadly conic, the 5 lobes oblong-lanceolate, 1-2 mm. long, reflexed; petals 5, white, obovate, 1.5-3 mm. long, at least half as broad as long; stamens 10, short, awl-shaped.


Ovary about inferior in fruit; mature follicles 2, 3.5-5 mm. long, often reddish or purplish.

Accepted Name:
Micranthes integrifolia (Hook.) Small
Publication: N. Amer. Fl. 22: 137. 1905.

Synonyms & Misapplications:
Saxifraga integrifolia Hook. [HC]
Saxifraga integrifolia Hook. var. integrifolia [HC]
Saxifraga laevicarpa A.M. Johnson
Additional Resources:

PNW Herbaria: Specimen records of Micranthes integrifolia in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Micranthes integrifolia checklist entry

OregonFlora: Micranthes integrifolia information

E-Flora BC: Micranthes integrifolia atlas page

CalPhotos: Micranthes integrifolia photos

49 photographs:
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