- Cotula australis
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Cotula australis 
Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Asterids Order: Asterales Family: Asteraceae Subfamily: Asteroideae Genus: Cotula Species: C. australis Binomial name Cotula australis
(Sieber ex Spreng.) Hook.Cotula australis is a species of plant in the daisy family known by the common names southern waterbuttons and Australian waterbuttons. This small plant is native to Australia and New Zealand, but it is known in other areas of the world as a common weed. The plant grows low to the ground in a thin mat with some slightly erect, spindly stems. The leaves are divided and subdivided into fringelike lobes. The plant flowers in inflorescences only a few millimeters wide containing minuscule yellow disc florets surrounded by greenish brown bracts. The fruit is a tiny winged achene about a millimeter wide.
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