Vascular Plants - Asteraceae - Senecio:
Senecio sylvaticus
Page Author: Don Knoke
woodland ragwort, woodland groundsel, wood groundsel 
Blooms: June - September
Habit: herb
Duration: annual
Origin: Introduced from Europe
Distribution: Introduced chiefly west of the Cascades, British Columbia to California
Habitat: Disturbed ground at low elevations
Species Description:

General: 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.

Distinguishing Characteristics: 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. vulgarisÆ are black-tipped) and the aroma (only S. sylvaticus is malodorous).
Accepted Name:
Senecio sylvaticus L.
Synonyms:
(none)

Treated in Flora of the PNW as:
Senecio sylvaticus
Additional Resources:

PNW Herbaria Specimens: View list of Senecio sylvaticus specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Senecio sylvaticus specimens in the WTU Herbarium database.

Washington Flora Checklist: Senecio sylvaticus treatment.

E-Flora BC: Senecio sylvaticus atlas page.

CalPhotos: Senecio sylvaticus images.

USDA Plants Database: Senecio sylvaticus.
Additional photographs of Senecio sylvaticus:
(click on a thumbnail to view larger photo)

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

Ben Legler, 2004

G. D. Carr, 2008

G. D. Carr, 2008

G. D. Carr, 2008

G. D. Carr, 2008

Regina Johnson, 2012

Regina Johnson, 2012
(password required)

Burke Museum


©2013 Burke Museum of Natural History and Culture.
All Rights Reserved. Box 353010, University of Washington,
Seattle, WA 98195-3010, Phone: 206-543-5590.
On the UW campus at 17th Avenue NE and NE 45th Street.
Washington Native Plant Society
WA Native Plant Society