Publication: Phytologia. 49: 48. 1981.
selected vouchers: WTU
Notes: FNA20: "Packera streptanthifolia is widespread and variable throughout the Western Cordillera. It includes weakly defined phases that have been treated as distinct species or as varieties. Characteristics used to delimit those taxa often overlap and are difficult to score; some "phases" grade into each other. Northern populations are sometimes segregated as a distinct taxon (e.g., Senecio streptanthifolia var. borealis; J. F. Bain 1988)."
Chambers and Sundberg (2000) follow Bain (1988) in recognizing varieties, but here we do not, following Douglas et al. (1998) and the species concept of Weber