Cotula australis
Fl. Nov.-Zel. 1: 128. 1852.
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. Phyllaries 13–22+ in 2–3 series, subequal (apices brown). 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. Cypselae: outer stalked, 1–1.2 mm, ± winged, faces ± papillate; inner sessile, 0.8–1 mm, not winged, not papillate. 2n = 36, 40.
Phenology: Flowering Jan–Sep.
Habitat: Disturbed sites
Elevation: 0–800 m
Distribution
Introduced; Ariz., Calif., Fla., Maine, Oreg., Tex., Australia, also in Northern Hemisphere: Mexico (Baja California), South America, Africa
Discussion
Selected References
None.