Washingtonia robusta H. Wendl.
Washingtonia robusta in Gart.-Zeitung (Berlin) 2: 198. 1883 sec. Espejo-Serna & López-Ferrari 2008
- =Washingtonia sonorae in Proc. Amer. Acad. Arts 24: 79. 1889 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Neowashingtonia sonorae in Contr. U.S. Natl. Herb. 5: 255. 1899 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Washingtonia filifera var. robusta, Bot. Gaz. 44: 420. f. 3-5, 12. 1907 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Washingtonia gracilis in Bot. Gaz. 44: 420, f. 8-10. 1907 syn. sec. Espejo-Serna & López-Ferrari 2008