Flora of North America species comparison

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Cotula australis

Australian cotula, Australian water-buttons, brass buttons
Habit Annuals, 2–10(–25+) cm.
Stems

branched ± throughout, ± strigillose to villous, glabrescent.
Leaves

petiolate or sessile;

blades obovate to spatulate, 2–3-pinnately lobed (ultimate lobes narrowly spatulate to linear), (1–)2–3(–6) cm.
Involucres

3–4(–6) mm diam.
Ray florets

0 (peripheral pistillate florets 8–80+ in 1–3+ series; corollas 0).
Disc corollas

ochroleucous to pale yellow, 0.5–0.8 mm.
Phyllaries

13–22+ in 2–3 series, subequal (apices brown).
Cypselae

outer stalked, 1–1.2 mm, ± winged, faces ± papillate;

inner sessile, 0.8–1 mm, not winged, not papillate.
2n

= 36, 40.

Cotula australis
Phenology Flowering Jan–Sep.
Habitat Disturbed sites
Elevation 0–800 m (0–2600 ft)
Distribution
from FNA
AZ; CA; FL; ME; OR; TX; South America; Australia; Africa [Introduced in North America; also introduced in Northern Hemisphere: Mexico (Baja California)]
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 19, p. 544.
Parent taxa Asteraceae > tribe Anthemideae > Cotula
Sibling taxa
C. coronopifolia
Synonyms Anacyclus australis
Name authority (Sieber ex Sprengel) Hooker f.: Fl. Nov.-Zel. 1: 128. (1852)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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