Rusty-hair Saxifrage



Micranthes rufidula (my-cranth-eez: small stamen; roo-fid-you-la: reddish). Synonyms: Saxifraga occidentalisSaxifraga rufidula.

Petals 5, ⅛” long [2–4 mm], oval with a distinct slender neck, white, without spots, sometimes becoming pink; 10 stamens with yellow to dark red anthers, slender (only slightly swollen) anthers; tiny calyx of 5 spreading lobes; pistil of 2 horns (rarely more); inflorescence flat-topped; leaves basal, tapering to flattened leafstalks 1½–3” long [4–8 cm], the blades oval to triangular, ½–1¾” long [12-40 mm], with tangled rusty brown hairs underneath, rather fleshy with coarse, even teeth, as if produced by a cookie cutter; flower stalks sticky-hairy, 2–8″ tall [8–20 cm], often reddening, leafless except for small bracts which, like the sepals, may or Saxifrage1may not have rusty brown hairs.

Habitat: Meadows and steep rocks that are moist or wet in spring, low to subalpine in coastal ranges of WA, OR, and sw BC. By waterfall creeks in the western Gorge and also around Catherine Creek in the eastern Gorge.

Similar: This species lies within a messy group of similar species that have been distinguished in several different ways, resulting in different sets of names. Western Mtn. Saxifrage, M. occidentalis, with a more open, pyramidal, taller inflorescence, reaches most corners of our range. Idaho Saxifrage, M. idahoensis, with strongly widened anthers and sometimes 2-spotted petals, grows in WA, ID, and ne OR. M. gormanii and M. hitchcockiana, with nearly horizontal inflorescence branches, are limited to w

Saxifrage4OR and sw WA. All 5 species are treated as varieties of Saxifraga occidentalis by some authorities. AlaskaSaxifrage, M. ferruginea, has 3 spotted petals distinctly wider than the other 2.

Natural History: Rusty-hair saxifrage petals, stamens, pistils, stalks, and leaves all commonly turn pink or red.

This article and photo are adapted from Northwest Mountain Wildflowers, an app for iPhone and iPod.