[Wikipedia] Importation, Spread: In the United States, it was imported very early in the 18th century and cultivated for its medicinal and piscicide properties. By 1818, it had begun spreading so much that Amos Eaton thought it was a native plant. In 1839, it was already reported in Michigan and in 1876, in California. It is now found commonly in all the states. (link added by Mary Ann Machi)
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Suggested Citation
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2024. Berkeley, California:The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 11/23/2024).
one or more occurrences