SafePlants

Cotula: A Versatile Genus

The genus Cotula encompasses a diverse group of plants, some of which are commonly known as waterbuttons.

Considerations for Pets

• Some species of Cotula, like Cotula australis, are small plants. Small parts can pose a potential choking hazard if ingested by pets.

Scientific Name and Common Names

• Scientific Name: Cotula L.
• Cotula australis: Southern waterbuttons, Australian waterbuttons
• Cotula coronopifolia: Water Buttons, Brass Buttons, batchelor's button, buttonweed

Taxonomy and Nomenclature

• Family: Asteraceae (Daisy family)
• Synonym for Cotula australis: Australian water-buttons (USDA NRCS, 2009+)

Distribution and Habitat

• Cotula coronopifolia is native to South Africa.
• It has naturalized in all Australian states and New Zealand.
• Cotula australis is native to Australia and New Zealand, and considered an exotic species in some regions (e.g., Orange County). It has been observed in Hawaii (Makawao, Maui).

Morphological Characteristics and Growth Habits

• Cotula coronopifolia is described as a spreading, low-growing perennial that reaches about 15 cm in height.

Quirky Facts

• The name "waterbuttons" is also used in a non-botanical context, describing sound effects, user interface elements, and even clothing buttons. This highlights the diverse uses of the term outside of the plant kingdom.
• Beyond its botanical use, the term "water buttons" is often associated with industrial equipment, plumbing controls, and even refrigerator components, indicating how broadly the term is used.

Further Information

• Discover Life offers a page dedicated to the biology, natural history, ecology, identification, and distribution of Cotula coronopifolia.
• WetlandInfo, Department of Environment and Heritage Protection, Queensland provides information on Cotula coronopifolia.