Cotula coronopifolia

Cotula coronopifolia_brass buttons_ Jutta Burger_cropped
Photo: Jutta Burger

Synonyms: Lancisia coronopifolia

Common names: common brassbuttons

Cotula coronopifolia (brassbuttons) is a perennial herb (family Asteraceae) found along the coast of California, in the Central Valley and the South Coast Ranges. Brassbuttons prefers moist habitat, including salt and freshwater marshes, wetlands, and vernal pools. It most commonly invades disturbed sites, but can spread into undisturbed sites as well. This South African native has flat yellow flower heads that produce small seeds, which are distributed by moving water and birds. Its stems grow roots at the nodes, allowing the plant to reproduce vegetatively. Although brassbuttons is known to be invasive, its spread appears to be relatively slow.

Cal-IPC Rating: Limited?

CDFA Rating: None?


Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.

Weed Management Notes

  • Management Notes - Information on management techniques and effectiveness from the University of California Cooperative Extension’s Weed Research & Information Center.

Cal-IPC Newsletter Articles

There are no newsletter articles associated with this species yet.

Cal-IPC Symposium Presentations

Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.

Other Cotula coronopifolia Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - Distribution map and records of this species in California.
  • CalWeedMapper - Distribution map of this species in California with ability to determine regional priorities.
  • EDDMapS - Distribution of this species in North America.
  • Jepson Interchange - Information on this plant's taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Information on identification and distribution, with links to websites in individual states.
  • Additional photos

    Cotula coronopifolia_common brassbuttons_JuttaBurger_cropped
    Cotula coronopifolia (common brassbuttons) flower heads. Photo: Jutta Burger
    Cotula coronopifolia_flower_JM DiTomaso
    Cotula coronopifolia (common brassbuttons) flower. Photo: JM DiTomaso
    Cotula coronopifolia_stem flower_JM DiTomaso
    Cotula coronopifolia (common brassbuttons) stem flower. Photo: JM DiTomaso
    Cotula coronopifolia_growth habit_copyright_2011_NealKramer
    Cotula coronopifolia (common brassbuttons) growth habit. Photo: &#169 2011 Neal Kramer