[Wikipedia] Eurasia Native: It is native to Eurasia, but it is known in many other parts of the world as an introduced species and a common roadside weed. (link added by Mary Ann Machi)
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2025.The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 03/28/2025).
