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

Senecio elmeri Piper
Elmer's butterweed (Elmer's ragwort)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #31300)

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Distribution of Senecio elmeri
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Species Information

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Perennial herb from a branching, rhizome-like woody stem-base; stems ascending, several, branched above, 9-30 cm tall, woolly-hairy at first becoming almost glabrous at flowering time.
Basal and lower stem leaves narrowly oblanceolate to broadly elliptic or rounded, stalked, 4-20 cm long, 1-3 cm wide, toothed, woolly-hairy at first becoming almost glabrous at flowering time; stem leaves well-developed but reduced upwards, becoming unstalked.
Heads with ray and disk flowers, several, nodding in a rounded inflorescence; involucres 7-12 mm tall; involucral bracts lanceolate, long-hairy and often purplish or blackish at the tips; bracteoles few, usually purplish-tipped; ray flowers yellow, 8-16 mm long; disk flowers yellow.
Achenes oblong, ribbed, glabrous; pappus of white hairlike bristles.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist talus or gravelly slopes in the subalpine and alpine zones; locally frequent in the Coast-Cascade Mountains of SW and SC BC; S to N WA.

Source: The Illustrated Flora of British Columbia


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 crepidineus Greene

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References