Alexander, J. A., W. Whaley, and N. Blain. “The Lomatium Grayi Complex (Apiaceae) of the Western United States: A Taxonomic Revision Based on Morphometric, Essential Oil Composition, and Larva-Host Coevolution Studies”. Journal of the Botanical Research Institute of Texas, Vol. 12, no. 2, Nov. 2018, pp. 387-44, https://journals.brit.org/jbrit/article/view/945.