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

Senecio fremontii Torr. & A. Gray
Fremont's Ragwort (dwarf mountain butterweed; dwarf mountain ragwort)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Ed McMackin  Email the photographer   (Photo ID #89321)

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Distribution of Senecio fremontii
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Senecio fremontii var. fremontii

Species Information

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Perennial herb from a taproot and a branching, woody stem-base; stems ascending to prostrate, several, branched, glabrous, 10-20 cm tall.
Basal leaves few and soon deciduous; stem leaves thickish, somewhat succulent, egg-shaped to spoon-shaped or oblanceolate, regularly to irregularly toothed, stalked, 1-4 cm long including the stalk, 0.2-2 cm wide, upper leaves slightly reduced and becoming unstalked, glabrous.
Heads with ray and disk flowers, numerous at the ends of branches, bases crisp-hairy; involucres 7-12 mm tall; involucral bracts lanceolate, with long-pointed tips, inconspicuously soft-hairy; bracteoles few, inconspicuous; rays yellow, 6-10 mm long; disk flowers yellow.
Achenes oblong, nerved, glabrous; pappus of white hairlike bristles.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to mesic talus and scree slopes in the alpine zone; frequent in S BC in and E of the Coast-Cascade Mountains; E to SW AB and S to CO and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Senecio fremontii

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) 1870 2265 2659
Slope Gradient (%) 10 48 101
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
20 118 300
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 2 6
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(11), BAFA(2), ESSF(9), IMA(3)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

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General References