Publication: Trans. Amer. Philos. Soc., n. s. 7: 340. 1840.
Origin: Native
Herbarium search: CPNWH
Notes: FNA19: "Variety brevissimus occupies nearly the full range of the genus (uncommon west of the Cascade Range); some occurrences toward the northeast appear to be recent introductions."
Last updated 11/2/2020 by David Giblin.