@article{Alexander_Whaley_Blain_2018, title={The Lomatium grayi complex (Apiaceae) of the western United States: a taxonomic revision based on morphometric, essential oil composition, and larva-host coevolution studies}, volume={12}, url={https://journals.brit.org/jbrit/article/view/945}, DOI={10.17348/jbrit.v12.i2.945}, abstractNote={<p>The <em>Lomatium</em> <em>grayi</em> complex is morphologically diverse across it range. The type species of this complex, <em>Lomatium</em> <em>grayi</em> s.s., has been found to not be a host of the larvae of <em>Papilio</em> <em>indra</em>, while the other three morphotypes are larval-hosts. A fifteen character, morphometric analysis was conducted on 390 herbarium specimens from throughout the range of this species. PCA, MANOVA, CDA, and Tukey tests revealed that the majority of the characters in this dataset were significantly different between four regional morphotypes. As a result of the morphometric analysis, the morphotypes are herein proposed as four species. Two new species are proposed for populations of <em>L. grayi</em> in the Pacific Northwest. <em>Lomatium</em> <em>papilioniferum</em> is proposed for plants in California, western Idaho, northern Nevada, Oregon, and Washington. <em>Lomatium</em> <em>klickitatense</em> is proposed for populations of robust plants from western Klickitat County, Washington, and northern Hood River County, Oregon. <em>Lomatium</em> <em>grayi</em> var. <em>depauperatum</em> is elevated to a species. This leaves no infraspecific taxa within <em>L. grayi</em> s.s. A presence/absence phenetic analysis of combined essential oil data was inconclusive regarding the composition of <em>L. grayi</em> s.s., which was found to be more similar to <em>Lomatium</em> <em>klickitatense</em> and <em>Lomatium</em> <em>depauperatum</em> than other species of <em>Lomatium</em>. Taxonomic treatments for each of the four species in this complex are provided. A key to these species and the multiple species that have been commonly mistaken for <em>L. grayi</em> is also included.</p>}, number={2}, journal={Journal of the Botanical Research Institute of Texas}, author={Alexander, Jason Andrew and Whaley, Wayne and Blain, Natalie}, year={2018}, month={Nov.}, pages={387–444} }