Cotula coronopifolia |
Cotula australis |
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brass buttons, common brass buttons |
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Habit | Glabrous, somewhat succulent perennial, often trailing or rooting at the nodes, 5-30 cm. tall. | |
Leaves | 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. |
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Flowers | 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. |
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Fruits | Achenes of the outer flowers broadly winged, shorter than the conspicuous stipe; others 2-nerved with a short stipe. |
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Cotula coronopifolia |
Cotula australis |
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Flowering time | June-September | |
Habitat | Tidal flats. | |
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.
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Origin | Introduced from South Africa | |
Conservation status | Not of concern | |
Sibling taxa | ||
Web links |
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