Publication: Taxon 63(1): 87. 2014.
Origin: Native
selected vouchers: WTU
Notes: FNA5: "We follow Ö. Nilsson (2001) in not recognizing infraspecific taxa that have been described based at least partly on pubescence. Variety propinqua has been applied to glabrous plants, which occur infrequently and sporadically throughout the range of the species. Where they do occur they are often intermixed with sparsely stipitate-glandular plants. This glabrous variety is rarely encountered in western North America."
References: (none)