Source: California Invasive Plant Council


URL of this page: http://www.cal-ipc.org/ip/management/plant_profiles/Arctotheca_calendula.php

Arctotheca calendula (sterile/fertile capeweed)

Arctotheca calendula
Arctotheca calendula
Photo courtesy Joseph DiTomaso

Arctotheca calendula (sterile/fertile capeweed) is a rosette-forming perennial (family Asteraceae) found in coastal prairies of the San Francisco Bay area and California’s north coast. An infertile type of capeweed is cultivated for use as an ornamental groundcover, and a fertile type has also been introduced. The infertile type is very competitive and can escape cultivation locally via creeping stolons, but fertile capeweed can spread faster, typically colonizing open or disturbed sites with exposed soil. Fertile capeweed is a major agricultural weed in Australia. New evidence suggests that the sterile and fertile forms are actually two separate species.

Jepson Manual, 2nd edition: The sterile form is Arctotheca prostrata; the fertile form remains Arctotheca calendula.

Cal-IPC Inventory rating: Moderate - Alert

Cal-IPC Resources on Arctotheca calendula

Cal-IPC News Articles

  • Darin, G. (2011). From Chinese Cleavers to Remote Sensing: An interview with two generations of weed workers - Greg and Gavin Archbald. Cal-IPC News. 19: 6, 7.
  • McKenzie, R. J. (2010). Call for capeweed specimens (Arctotheca spp.). Cal-IPC News. 18: 9, 15.
  • Connick, S. and M. Gerel (2005). Don't sell a pest: A new partnership to prevent plant invasions through horticulture. Cal-IPC News. 13: 4-5,14.
  • (1993). California Exotic Pest Plant Council draft list exotic plants of greatest concern October 1993. CalEPPC News. 1: 6.

Cal-IPC Symposium Proceedings

  • Connick, S. and M. Gerel (2004). Partnering to prevent invasions of plants of horticultural origin. California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Cooper, V. K. and B. J. Moritsch (1999). Weeding the wilderness: Non-native plant management at Point Reyes National Seashore. California Exotic Pest Plant Council Symposium '99. Sacramento, CA.
  • O'Connell, R. A. (1999). The state of California's noxious weed eradication programs. California Exotic Pest Plant Council. Sacramento, CA.
  • O'Connell, R. A. (1997). Hydrilla: A case study: The state of California's noxious weed eradication programs. California Exotic Pest Plant Council Symposium '97. Concord, CA.

Other Resources on Arctotheca calendula