Publication: Sp. Pl. 1: 263. 1753.
Origin: Introduced from Europe
Herbarium search: CPNWH
Notes: This species is known only from Suksdorf collections in Bingen around the turn of the 20th century. Since it has not been collected in Washington since then, this species is considered excluded until contemporary collections are generated for Washington.
Last updated 5/7/2020 by David Giblin.