Publication: Sp. Pl. 1: 273. 1753.
selected vouchers: WTU
Notes: The Jepson Manual, 2nd Edition and Illustrated Flora of British Columbia both synonymize all infraspecific taxa for this species. H&C recognize various infraspecific taxa, of which var. neogaea is tracked as a rare plant by the Washington Natural Heritage Program. Until a contemporary treatment supports the taxonomy of this species described by H&C, the treatment here follows Jepson and Illustrated Flora B.C.