Page author: David Giblin
Galinsoga quadriradiata
ciliate galinsoga, shaggy galinsoga, quickweed

Distribution: Occurring west of the Cascades crest in lowland western Washington; British Columbia to Washington, east across southern Canada to central and eastern North America.

Habitat: Fields, roadsides, gardens, wastelots, and other disturbed areas at low elevations.

Flowers: June-October

Origin: Introduced from Central and South America

Conservation Status: Not of concern


Freely branching annual, 2-7 dm. tall, the stem spreading-hairy.


Leaves opposite, simple, coarsely toothed, ovate or lance-ovate, petiolate, 2-7 cm. long and 1-4 cm. wide.


Heads numerous in leafy cymes, the disk 3-6 mm. wide; rays few, white, short and broad, pistillate and fertile, with pappus scales equaling the tube; pappus scales of disk flowers tapering to awn tips; involucre bracts few and broad, joined at the base, each subtending a ray; receptacle conic, chaffy throughout.


Achenes 4-angled.

Accepted Name:
Galinsoga quadriradiata Ruiz & Pav.
Publication: Syst. Veg. Fl. Peruv. Chil. 1: 198. 1798.

Synonyms & Misapplications:
Galinsoga ciliata (Raf.) S.F. Blake [HC]
Additional Resources:

PNW Herbaria: Specimen records of Galinsoga quadriradiata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Galinsoga quadriradiata checklist entry.

E-Flora BC: Galinsoga quadriradiata atlas page.

CalPhotos: Galinsoga quadriradiata photos.

USDA Plants: Galinsoga quadriradiata information.

9 photographs:
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