[Butterweeds, Groundsels and Ragworts: The Genus Senecio West of the Cascade Mountains of Oregon and Washington]

Stinking Willie, Tansy Ragwort

Jacobaea vulgaris

Synonym: Senecio jacobaea

This taxon is considered to be Jacobae vulgaris in Washington, while it is considered to be Senecio jacobaea in Oregon.

Stinking Willie, Tansy Ragwort: Jacobaea vulgaris (Synonym: Senecio jacobaea)

Tansy ragwort as an urban curb weed in the neighborhoods near Red Sunset Park, Gresham, OR.....October 4, 2025.

Stinking Willie, Tansy Ragwort: Jacobaea vulgaris (Synonym: Senecio jacobaea)

Paul Slichter