Lomatium donnellii was first described in 1888 by John Merle Coulter and Joseph Nelson Rose as Peucedanum donnellii. In 1900, they transferred it to Lomatium.[4] In 1889, they described Peucedanum plummerae, which they also transferred to Lomatium in 1900.[5] As of August 2021[update], Plants of the World Online considers Lomatium plummerae and its variety helleri to be synonyms of Lomatium donnellii.[1] In addition, the Jepson eFlora considers L. plummerae var. austiniae and var. sonnei to be synonyms of Lomatium donnellii,[6] whereas Plants of the World Online considers them synonyms of Lomatium austiniae.[7]
^USDA, NRCS (n.d.). "Lomatium donnellii". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 23 June 2015.
^Slichter, Paul. "Donnell's Biscuitroot". Flora and Fauna Northwest. Retrieved 21 February 2021.