Seeds of South Australia
Cotula coronopifolia (Compositae)
Button Weed
List of species for Cotula
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Herbarium regions:
Lake Eyre, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Cotula]
Name derivation:
Greek 'cotyle' small cup and Latin 'corona' crown, 'pous' foot, having leaves like Coronopus
Distribution:
Grows as an emergent aquatic in fresh and saline water at the edges of pools and streams, and as smaller plants on marshy ground
Status:
Native
Plant description:
Spreading perennial to 60 cm high forming dense mats. Leaves linear to oblong, sheathing at the base, mostly pinnatifid with entire subacute lobes, 1-8 cm long, glabrous, somewhat fleshy. Capitula  8-12 mm in diameter, outer florets 1-seriate, lacking corollas, inner florets yellow. Flowering July - November.
Fruit type:
Achenes 1.5–2 mm long; outer strongly flattened, densely glandular-hairy, winged; inner ± flattened, sparsely glandular, with narrow marginal ridges