E-Flora BC: Electronic Atlas of the Flora of British Columbia

Micranthes ferruginea
Alaska saxifrage
Saxifragaceae (Saxifrage family)

Introduction to Vascular Plants

© Rosemary Taylor  Email the photographer   (Photo ID #40612)

E-Flora BC Static Map
Distribution of Micranthes ferruginea
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Species Information

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Perennial herb from thick stem-bases and dense fibrous roots; flowering stems 1 or more, 15-35 cm tall, branched, soft-hairy below, glandular-hairy above.
Basal leaves in a rosette, oblanceolate to wedge-shaped, 2-10 cm long, 5-15 mm wide, 7- to 17-toothed, gradually tapered at base to winged stalks, somewhat fleshy, greyish-hairy, thin-hairy or sparsely fringed; stem leaves lacking.
Inflorescence open, diffuse, branched, the bracts leaf-like or greatly reduced and linear, the lower ones often with bulblets; petals white, curved to one side of flower, 4-6 mm long, of 2 types, 3 wider and egg-shaped with bases squared-off to heart-shaped, the other 2 more elliptic-lanceolate to broadly egg-shaped, the bases wedge-shaped; calyces nearly free of ovary, lobed almost to base, the lobes oblong-egg-shaped, 1.5-2.5 mm long, reddish or purplish, sharply bent back; stamens 10.
Capsules, 4-6 mm long; seeds brownish, about 0.7 mm long, with several lengthwise rows of pimples.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist rock outcrops, gravelly slopes and streambanks in the lowland to alpine zones; frequent throughout BC, except absent in NE BC; N to AK and YT, E to AB and S to WY, ID and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Micranthes ferruginea

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 5 1601 2370
Slope Gradient (%) 0 36 250
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
5 200 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 7
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: AT(17), BAFA(45), CMA(25), CWH(35), ESSF(153), ICH(8), IDF(1), IMA(15), MH(36), MS(2), SBS(3)

Synonyms and Alternate Names

Saxifraga ferruginea Graham

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References