Descurainia sophia

Photo courtesy Debra L. Cook

Synonyms: Arabis sophia, Sisymbrium sophia

Common names: tansy mustard, flixweed

Descurainia sophia (flixweed) is an annual or biennial (family Brassicaceae) found throughout California along roadsides, in agricultural fields, disturbed desert areas, scrub, grasslands and woodlands. It is most common in the northeastern region, particular in the Great Basin. It tends to prefer well-drained sandy or stony soils. Flowering flixweed plants can be toxic to cattle when they are eaten over a long period of time. It produces abundant seed, which can be spread by soil or water movement, and by clinging to animals, humans and vehicle tires, but its rate of spread is relatively slow except in disturbed areas. Flixweed may invade recently disturbed areas and then become less dominant as native species become re-established.

Cal-IPC Rating: Limited

Cal-IPC Assessment

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 RIC 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

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Cal-IPC Symposium Presentations

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Other Descurainia sophia Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - See the distribution of this species on Calflora's map of California.
  • CalWeedMapper - Distribution information with ability to determine regional priorities.
  • Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Federal database with information on identification and distribution, and links to websites in individual states.