Carrichtera annua

Carrichtera annua_Flora y Vegetacion Wikimedia
Photo: Wikimedia

Synonyms: Vella annua

Common names: Ward's weed

Carrichtera annua (Ward’s weed) is an annual herb (family Brassicaceae ) with white to yellow flowers and hairy lobed leaves found in the south coast ranges of California. It is native to the Mediterranean and southwestern Asia. It favors grasslands and scrub and chaparral habitat. It reproduces by seed only. Seeds are dispersed by foraging animals, vehicles, agricultural activities and humans.

Cal-IPC Rating: Moderate — Alert?

CDFA Rating: A?


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.

Species ID Card

Invasive Species ID Card - To support field identification of early detection species, Cal-IPC has designed a set of Species ID cards that can be downloaded, printed double-sided, and trimmed to size.

Weed Management Notes

No Weed RIC Management Notes are available for this species. Check for information on other species in the genus on the Weed RIC site.

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 Carrichtera annua 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.
  • Additional photos

    Carrichtera annua_flower and leaves_ChrisMcDonald
    Carrichtera annua (Ward's weed) flower and leaves. Photo: Chris McDonald
    Carrichtera annua_fruits_AndyJones
    Carrichtera annua (Ward's weed) fruits. Photo: Andy Jones
    Carrichtera annua_leaves and stems_JasonGiessow
    Carrichtera annua (Ward's weed) leaves and stems. Photo: Jason Giessow
    Carrichtera annua_growth habit_JasonGiessow
    Carrichtera annua (Ward's weed) growth habit. Photo: Jason Giessow