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

Senecio viscosus L.
sticky ragwort
Asteraceae (Aster family)

Introduction to Vascular Plants

© Bryan Kelly-McArthur  Email the photographer   (Photo ID #76475)

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Distribution of Senecio viscosus
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Species Information

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Annual or biennial herb from a taproot; stems erect, solitary, usually branched, sticky-glandular, 10-60 cm tall.
Basal leaves smaller than the stem leaves, usually deciduous by flowering time; stem leaves lanceolate to oblanceolate, stalked to unstalked, 2.5-10 cm long, 1-6 cm wide, deeply pinnately lobed, the segments again toothed or lobed, sticky-glandular, not much reduced upwards.
Heads with ray and disk flowers, few to numerous on sticky-glandular stalks in an open inflorescence; involucres 7-10 mm tall; involucral bracts lanceolate, sticky-glandular, green, margins papery, faintly black-tipped; bracteoles few, inconspicous; ray flowers yellow, mostly 1-4 mm long; disk flowers yellow.
Achenes oblong, faintly ribbed, glabrous; pappus of white hairlike bristles.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry to mesic roadsides, waste places and disturbed areas; infrequent in coastal, SW and SC BC, locally common in WC BC; introduced from Europe.

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.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References