Publication: Syn. Fl. N. Amer. 1(1,1): 129. 1895.
Origin: Introduced from Europe
Herbarium search: CPNWH
Notes: Recently collected (May 2016) at Port Townsend, Jefferson County, Washington. Also known as an historical waif near Portland, Oregon. More common in California.
Last updated 4/2/2022 by David Giblin.