Burke: Senecio sylvaticus vs. Senecio clarkianus

	Senecio sylvaticus	Senecio clarkianus
	wood groundsel, woodland groundsel, woodland ragwort
Habit	Sparsely pubescent, tap-rooted annual, usually with a simple stem 1.5-8 dm. tall
Leaves	Leafy throughout, the leaves more or less pinnatifid and irregularly toothed, 2-12 cm. long and 4-40 mm. wide, narrowly lanceolate in outline.

	Senecio sylvaticus	Senecio clarkianus
Identification notes	Separate from the only other annual Senecio in our area by the number of involucre bracts (S. vulgaris has about 21, S. sylvaticus,13), the bracteoles (only S. vulgaris are black-tipped) and the aroma (only S. sylvaticus is malodorous).
Flowering time	May-September
Habitat	Roadsides, fields, forest edge, wastelots, and other disturbed areas at low elevation.
Distribution	Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, also in eastern North America. [WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Origin	Introduced from Europe
Conservation status	Not of concern
Sibling taxa	S. elmeri, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. lugens, S. neowebsteri, S. serra, S. triangularis, S. viscosus, S. vulgaris	S. elmeri, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. lugens, S. neowebsteri, S. serra, S. sylvaticus, S. triangularis, S. viscosus, S. vulgaris
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Senecio clarkianus

wood groundsel, woodland groundsel, woodland ragwort

Habit

Sparsely pubescent, tap-rooted annual, usually with a simple stem 1.5-8 dm. tall

Leaves

Leafy throughout, the leaves more or less pinnatifid and irregularly toothed, 2-12 cm. long and 4-40 mm. wide, narrowly lanceolate in outline.

Senecio clarkianus

Identification notes

Separate from the only other annual Senecio in our area by the number of involucre bracts (S. vulgaris has about 21, S. sylvaticus,13), the bracteoles (only S. vulgaris are black-tipped) and the aroma (only S. sylvaticus is malodorous).

Flowering time

May-September

Habitat

Roadsides, fields, forest edge, wastelots, and other disturbed areas at low elevation.

Distribution