Source: California Invasive Plant Council

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Emex spinosa (spiny emex, devilís-thorn)

Emex spinosa
Emex spinosa
Photo courtesy Joseph DiTomaso

Emex spinosa (spiny emex, devilís-thorn) is an annual (family Polygonaceae) found on Californiaís south coast. This Mediterranean native is not yet common in California, but it is spreading rapidly and is known to crowd out native species. It frequently infests disturbed areas, especially in coastal habitats. Emex spinosaís spiny seed pods stick to people and animals, so it spreads quickly along trails and then into undisturbed areas.

Cal-IPC Inventory rating: Moderate - Alert

Cal-IPC Resources on Emex spinosa

Cal-IPC News Articles

  • None for this species.

Cal-IPC Symposium Proceedings

  • None for this species.

Other Resources on Emex spinosa

  • USDA PLANTS database - Federal database with information on identification and distribution, and links to websites in individual states.
  • Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from the UC Berkeley Jepson Herbarium.
  • CalFlora - Distribution information by county based on submitted observations and herbarium specimens.