Washingtonia occidentalis (Nuttall) J.M. Coulter & Rose nom. illeg.
Washingtonia occidentalis (Nuttall) J.M. Coulter & Rose nom. illeg. is a synonym sensu TROPICOS of:
Osmorhiza occidentalis (Nuttall ex Torrey & A. Gray) Torrey, an accepted species name sensu FNA Ed. Comm., in prep. f.