Blooms: July - October
Habit: herb
Duration: annual
Origin: Introduced from Europe
Distribution: Introduced and widespread in the United states; more common west of the Cascades in Washington.
Habitat: Roadsides and waste ground.
Habit: herb
Duration: annual
Origin: Introduced from Europe
Distribution: Introduced and widespread in the United states; more common west of the Cascades in Washington.
Habitat: Roadsides and waste ground.
Species Description:
General: Mostly glabrous annual with a short taproot, 1-10 dm. tall, the juice milky.
Leaves: Lowermost leaves ovate and petiolate, the others pinnatifid, with backward-pointing segments, or occasionally merely toothed, 6-30 cm. long and 1-15 cm. wide, the margins weakly prickly; all leaves with prominent, pointed auricles; leaves progressively less-divided upwards and somewhat reduced.
Flowers: Heads several in a flat-topped inflorescence, relatively small, usually only 1.5-2.5 cm. wide; involucre 9-14 mm. high, the bracts of uneven lengths, some quite short; corollas all ligulate and perfect, yellow; pappus of numerous, white, capillary bristles.
Fruits: Achenes 2.5-3 mm. long, with transverse wrinkles.
General: Mostly glabrous annual with a short taproot, 1-10 dm. tall, the juice milky.
Leaves: Lowermost leaves ovate and petiolate, the others pinnatifid, with backward-pointing segments, or occasionally merely toothed, 6-30 cm. long and 1-15 cm. wide, the margins weakly prickly; all leaves with prominent, pointed auricles; leaves progressively less-divided upwards and somewhat reduced.
Flowers: Heads several in a flat-topped inflorescence, relatively small, usually only 1.5-2.5 cm. wide; involucre 9-14 mm. high, the bracts of uneven lengths, some quite short; corollas all ligulate and perfect, yellow; pappus of numerous, white, capillary bristles.
Fruits: Achenes 2.5-3 mm. long, with transverse wrinkles.
Accepted Name:
Sonchus oleraceus L.Synonyms:
(none)
Treated in Flora of the PNW as:
Sonchus oleraceus
Additional Resources:
PNW Herbaria Specimens: View list of Sonchus oleraceus specimens in the Consortium of Pacific Northwest Herbaria database.
WTU Herbarium Specimens: View list of Sonchus oleraceus specimens in the WTU Herbarium database.
Washington Flora Checklist: Sonchus oleraceus treatment.
E-Flora BC: Sonchus oleraceus atlas page.
CalPhotos: Sonchus oleraceus images.
USDA Plants Database: Sonchus oleraceus.
J. William Thompson
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
G. D. Carr, 2005
G. D. Carr, 2005
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 WA Native Plant Society |
