[Wikipedia] Europe Native, Habitat: It is native to Europe, and it is found in parts of western North America as an introduced species. It often grows in moist habitat, such as marshes. (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: 05/13/2025).
