Publication: Univ. Calif. Publ. Bot. 9: 378. 1921.
Origin: Native
Herbarium search: CPNWH
Notes: FNA21: "Variety integrifolium intergrades with var. lanatum in Oregon and Washington near the Columbia River. The intermediate populations that have been analyzed are polyploid (J. S. Mooring 2001)."
Last updated 10/2/2020 by David Giblin.