Alexander, J. A. (Department of Botany and Plant Pathology, Oregon State University, 2082 Cordley Hall, Corvallis, OR, 97331-2902, U.S.A.; firstname.lastname@example.org). The taxonomic status of Astragalus mokiacensis (Fabaceae), a species endemic to the southwestern United States. Brittonia 57: 320–333. 2005.—Astragalus mokiacensis has been a problematic species since it was first described in 1877. Every major revision delimited this taxon differently. A principal components analysis of morphological data from herbarium specimens was used to determine the affinities between type specimens and extant populations of A. mokiacensis. The taxon recently recognized as A. lentiginosus var. trumbullensis is morphologically similar to the lectotype of Astragalus mokiacensis. Astragalus lentiginosus var. trumbullensis is herein recognized as a low-elevation minor variant and considered a synonym of A. mokiacensis. A taxonomic key and complete synonymy are included.
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Vol. 57 • No. 4