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

Senecio pseudoarnica Less.
beach groundsel (seaside ragwort)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Scott T. Black  Email the photographer   (Photo ID #81313)

E-Flora BC Static Map
Distribution of Senecio pseudoarnica
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Species Information

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Perennial herb from an erect to ascending rhizome; stems erect or ascending, solitary, simple or branched, glabrous below, woolly-hairy above, 5-90 cm tall.
Basal leaves usually smaller than the stem leaves, deciduous by flowering time; stem leaves thick, spoon-shaped to oblanceolate, egg-shaped or oblong, broadly stalked to unstalked, 2-25 cm long, 1-10 cm wide, toothed, sparsely to moderately woolly-hairy above and below or nearly glabrous above, not much reduced upwards except in the inflorescence.
Heads with ray and disk flowers, up to 4.5 cm across, solitary to several on glabrous to woolly-hairy stalks in a compact inflorescence; involucres 10-25 mm tall; involucral bracts lance-oblong to more linear, green or purplish, margins translucent, sparsely to moderately woolly-hairy; bracteoles numerous, equal to or longer than the involucral bracts; ray flowers yellow, mostly 10-25 mm long; disk flowers yellow.
Achenes oblong, faintly nerved, glabrous; pappus of white hairlike bristles.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to mesic sand dunes, beaches and tidal flats in the lowland zone; rare on the N Queen Charlotte Islands; amphiberingian, N to AK, disjunct on the coasts of Labr., NF, PQ, NS and NB, NE Asia.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Senecio pseudoarnica

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) 1125 1422 1719
Slope Gradient (%) 0 3 7
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
245 245 245
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 5 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: BWBS(1), ESSF(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.

Taxonomic and Nomenclatural Links

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General References