Washingtonia H. Wendl. Washingtonia H. Wendl. in Bot. Zeitung (Berlin) 37(5): 68. 1879 sec. Palmweb 2018=Neowashingtonia Sudw. in U.S.D.A. Div. Forest Bull. 14: 105. 1897, nom. illeg., syn. sec. Palmweb 2018