Source: California Invasive Plant Council


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

Alternanthera philoxeroides (alligatorweed)

Alternanthera philoxeroides
Alternanthera philoxeroides
Photo courtesy Joseph DiTomaso

Alternanthera philoxeroides (alligatorweed) is a noxious herbaceous aquatic perennial (family Amaranthaceae), that forms dense floating mats. This weed grows in the San Joaquin Valley (Tulare and Kings counties) and in Los Angeles County. It invades lakes, streams, canals, ponds and irrigation ditches. It was previously used in the aquarium trade.

Cal-IPC Inventory rating: High

Cal-IPC Resources on Alternanthera philoxeroides

Cal-IPC News Articles

  • Pitcairn, M. (2000). All weeds that have approved biological control agents, accidental introductions and others. CalEPPC News. 8.

Cal-IPC Symposium Proceedings

  • Chornesky, E. A. and C. M. Palmer (1995). Use of biologically based methods to control pest plants:Issues related to federal research, regulation, and implementation. Proceedings California Exotic Pest Plant Council Symposium '95. Pacific Grove, CA.
  • Leavitt, J. R. and C. Pirosko (2002). A brief overview of the California Dept. of Food and Agriculture's A-rated noxious weed education and eradication program. California Exotic Pest Plant Council Symposium 2002. 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.
  • O'Connell, R. A. (1999). The state of California's noxious weed eradication programs. California Exotic Pest Plant Council. Sacramento, CA.

Other Resources on Alternanthera philoxeroides