This is the publisher’s final pdf. The published article is copyrighted by Western North American Naturalist Publications\ud and can be found at: https://ojs.lib.byu.edu/wnan/.Through a phylogenetic study Using LECCYCIA nucleotide sequences and a survey of historical Botanical literature, we propose clarifications in the nomenclature of Lupinus oreganus and Lupinus biddlei. The former taxon has been incorrectly classified as Lupinus sulphurcus ssp. kincaidii and recently as L. oreganus var. kincaidii. The latter has recently been incorrectly delimited as L. oreganus var. oreganus
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