Page author: Don Knoke
Cotula coronopifolia
brass buttons, common brass buttons
WTU specimens
Other herbaria

Distribution: Introduced along the coast of the Pacific states, occasionally inland

Habitat: Chiefly in tidal flats; occasionally in other moist areas

Flowers: June - September

Origin: Introduced from South Africa

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. 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.

E-Flora BC: Cotula coronopifolia atlas page.

CalPhotos: Cotula coronopifolia photos.

USDA Plants: Cotula coronopifolia information.

15 photographs:
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