Page authors: Don Knoke, David Giblin
Cotula coronopifolia
brass buttons, common brass buttons

Distribution: Occurring west of the Cascades crest along the Puget Sound, outer coast, and lower Columbia River shorelines. Alaska to California, east to Nevada and Arizona, also in northeastern North America.

Habitat: Tidal flats.

Flowers: June-September

Origin: Introduced from South Africa

Growth Duration: Perennial

Conservation Status: Not of concern


Glabrous, somewhat succulent perennial, often trailing or rooting at the nodes, 5-30 cm. tall.


Leaves sessile, with a sheathing base, entire or with a few coarse teeth or deep narrow lobes, narrowly oblong or lanceolate to linear, 1-6 cm. long and 1-10 mm. wide, broader when lobed.


Heads solitary at the ends of the branches, the disk 5-11 mm. wide; the outer ring of flowers on the disk all pistillate, without a corolla, the other flowers perfect, bright yellow, with a short tubular corolla with 4 teeth; involucre bracts in two series; receptacle naked; pappus none.


Achenes of the outer flowers broadly winged, shorter than the conspicuous stipe; others 2-nerved with a short stipe.

Accepted Name:
Cotula coronopifolia L.
Publication: Sp. Pl. 2: 892. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Cotula coronopifolia in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Cotula coronopifolia checklist entry.

OregonFlora: Cotula coronopifolia information.

E-Flora BC: Cotula coronopifolia atlas page.

CalPhotos: Cotula coronopifolia photos.

USDA Plants: Cotula coronopifolia information.

15 photographs:
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