Page authors: David Giblin, Don Knoke
Micranthes rufidula
rusty-hair saxifrage
WTU specimens
Other herbaria

Distribution: Both sides of the Cascades in Washington; British Columbia south to California.

Habitat: Wet open areas, ledges, rock outcroppings from moderate to high elevations in the mountains.

Flowers: May-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Herbaceous perennial from short, horizontal rhizomes, the 1-3 leafless, reddish-glandular stems 1-2.5 dm. tall.

Leaves:

Leaves basal, the blades ovate, up to 6 cm. long and 3 cm. wide, with 15-30 rounded teeth, reddish-woolly on the lower surface; petioles slender, shorter or somewhat longer than the blades.

Flowers:

Inflorescence an open, flat-topped panicle, the bracts reddish-woolly; calyx reddish-woolly, divided about half its length, the 5 ovate lobes 1-2.5 mm. long; petals 5, white, 2-3.5 mm. long, broadly ovate, narrowed abruptly to the base; stamens 10, the filaments awl-shaped, reddish; ovary about 1/3 inferior.

Fruits:

Follicles reddish

Accepted Name:
Micranthes rufidula Small
Publication: N. Amer. Fl. 22: 140. 1905. 1905.

Synonyms & Misapplications:
Saxifraga aequidentata (Small) Rosend.
Saxifraga klickitatensis A.M. Johnson
Saxifraga occidentalis S. Watson ssp. rufidula (Small) Bacig.
Saxifraga occidentalis S. Watson var. aequidentata (Small) M. Peck
Saxifraga occidentalis S. Watson var. rufidula (Small) C.L. Hitchc. [HC]
Saxifraga rufidula (Small) Fedde [KZ99]
Saxifraga rufidula (Small) J.M. Macoun, invalid name
Additional Resources:

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

WA Flora Checklist: Micranthes rufidula checklist entry.

E-Flora BC: Micranthes rufidula atlas page.

CalPhotos: Micranthes rufidula photos.

USDA Plants: Micranthes rufidula information.

21 photographs:
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