Simsia ovata (A. Gray) E.E. Schill. & Panero in Brittonia 62(4): 317. 2010 sec. Pruski & Robinson 2018
- =Gymnolomia ovata A. Gray in Proc. Amer. Acad. Arts 19: 4. 1883 syn. sec. Pruski & Robinson 2018
- =Viguiera ovata (A. Gray) S.F. Blake in Contr. Gray Herb. 54: 76. 1918 syn. sec. Pruski & Robinson 2018