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

Senecio integerrimus var. exaltatus Nutt. (Nutt.) Cronquist
western groundsel (Columbia ragwort)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #23942)

E-Flora BC Static Map
Distribution of Senecio integerrimus var. exaltatus
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Species Information

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Perennial herb from a fibrous-rooted, short, erect woody stem-base; stems erect, solitary, branched above, sparsely to densely woolly-hairy, 20-70 cm tall.
Basal leaves thick, somewhat succulent, narrowly oblanceolate to elliptic or nearly round, stalked, 6-25 cm long including the stalk, 1-6 cm wide, entire or sometimes iregularly toothed, hairy when young becoming less so with age; stem leaves similar, progressively reduced upwards, becoming unstalked.
Heads with ray and disk flowers, several to numerous in a compact inflorescence; involucres 5-10 mm tall; involucral bracts lanceolate, hairless to moderately long-hairy, usually conspicuously black-tipped; bracteoles few, black-tipped; ray flowers yellow, rarely white or creamy; disk flowers yellow.
Achenes oblong, ribbed, glabrous or coarse-hairy; pappus of white hairlike bristles.
Two poorly-defined varieties occur in BC. The var. ochroleucus has not been collected in BC since 1897.

1. Ray flowers white.............. var. ochroleucus (A. Gray) Cronq.

1. Ray flowers yellow................... var. exaltatus (Nutt.) Cronq.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to dry grasslands, shrublands, forest openings and meadows in the steppe to lower subalpine zones; var. integerrimus common in S BC in and E of the Coast-Cascade Mountains, var. ochroleucus rare in SC and SE BC; E to SK and MN and S to CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Senecio integerrimus var. exaltatus

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) 634 1120 1536
Slope Gradient (%) 20 29 40
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
36 103 237
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 2 3
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: ICH(1), IDF(2), PP(1)


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.

Synonyms and Alternate Names

Senecio columbianus Greene
Senecio exaltatus Nutt.
Senecio hookeri Torr. & A. Gray
Senecio integerrimus var. vaseyi (Greenm.) Cronq.
Senecio lugens var. exaltatus (Nutt.) Gray
Senecio vaseyi Greenm.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References