Calflora
Taxon  Report   2118    
Cirsium arvense  (L.) Scop.
Canada thistle
Cirsium arvense, a dicot, is a perennial herb that is not native to California; it has been naturalized in the wild. Cal-IPC rating: Moderate
Observation Hotline
(observation details)
one or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Family: ASTERACEAE  
Genus: Cirsium

Wetlands:
Arid West: Occurs usually in non wetlands, occasionally in wetlands
Mountains, Valleys and Coast: Equally likely to occur in wetlands and non wetlands

Communities: wetland-riparian

Name Status:
Accepted by ICPN + PLANTS

Alternate Names:
PLANTS: Breea arvensis
PLANTS: Cirsium setosum
PLANTS: Cirsium incanum
. . .
More information about  Cirsium arvense

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: Sep 23, 2019).