Sphenopholis interrupta (Buckley) Scribn. in Rhodora 8(92): 145. 1906 sec. Dávila & al. 2018
- =Avena elongata Kunth, Nov. Gen. Sp. (quarto ed.) 1: 148. 1815 syn. sec. Dávila & al. 2006
- =Trisetarium elongatum (Kunth) Poir., Encycl. 5: 366. 1817 syn. sec. Dávila & al. 2006
- =Trisetum elongatum (Kunth) Kunth, Révis. Gramin. 1: 101. 1829 syn. sec. Dávila & al. 2006
- =Trisetum interruptum Buckley in Proc. Acad. Nat. Sci. Philadelphia 14: 100. 1862 syn. sec. Dávila & al. 2006
- =Calamagrostis longirostris Buckley, Prelim. Rep. Surv. Texas: App. 2. 1866 syn. sec. Dávila & al. 2006
- =Trisetum hallii Scribn. in Bull. Torrey Bot. Club 11: 6. 1884 syn. sec. Dávila & al. 2006
- =Sphenopholis hallii (Scribn.) Scribn. in Rhodora 8(92): 146. 1906 syn. sec. Dávila & al. 2006