Sphenopholis obtusata (Michx.) Scribn. in Rhodora 8(92): 144. 1906 sec. Dávila & al. 2018
- ≡Aira obtusata Michx., Fl. Bor.-Amer. 1: 62. 1803 syn. sec. Dávila & al. 2006
- =Festuca obtusata Michx. ex P. Beauv., Ess. Agrostogr.: 163. 1812 syn. sec. Dávila & al. 2006
- =Aira truncata Muhl., Descr. Gram.: 83. 1817 syn. sec. Dávila & al. 2006
- =Koeleria paniculata Nutt., Gen. N. Amer. Pl. 2: (Add. 2). 1818 syn. sec. Dávila & al. 2006
- =Koeleria truncata (Muhl.) Torr., Fl. N. Middle United States 1: 116. 1823 syn. sec. Dávila & al. 2006
- =Poa obtusata (Michx.) Link, Hort. Berol. 1: 76. 1827 syn. sec. Dávila & al. 2006
- =Reboulea gracilis Kunth, Révis. Gramin. 2: 341, t. 84. 1830 syn. sec. Dávila & al. 2006
- =Trisetum lobatum Trin. in Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 1(1): 66. 1830 syn. sec. Dávila & al. 2006
- =Agrostis obtusata Steud., Nomencl. Bot. 1: 41. 1840 syn. sec. Dávila & al. 2006
- =Koeleria lobata Trin. ex Steud., Nomencl. Bot. (ed. 2) 1: 849. 1840 syn. sec. Dávila & al. 2006
- =Koeleria obtusata Trin. ex Steud., Nomencl. Bot. (ed. 2) 1: 849. 1840 syn. sec. Dávila & al. 2006
- =Reboulea obtusata (Michx.) A. Gray, Manual: 591. 1848 syn. sec. Dávila & al. 2006
- =Reboulea obtusata (Michx.) A. Gray var. obtusata, Manual: 591. 1848 syn. sec. Dávila & al. 2006
- =Eatonia obtusata (Michx.) A. Gray, Manual (ed. 2): 558. 1856 syn. sec. Dávila & al. 2006
- =Reboulea truncata Torr. ex Munro in J. Linn. Soc., Bot. 6: 43. 1862 syn. sec. Dávila & al. 2006
- =Graphephorum densiflorum E. Fourn. in Bull. Soc. Bot. France 24: 182. 1877 syn. sec. Dávila & al. 2006
- =Aira mexicana Trin. ex E. Fourn., Mexic. Pl. 2: 111. 1886 syn. sec. Dávila & al. 2006
- =Eatonia densiflora E. Fourn., Mexic. Pl. 2: 111. 1886 syn. sec. Dávila & al. 2006
- =Aira obtusa Raf. in J. Phys. Chim. Hist. Nat. Arts 89: 104. 1891 syn. sec. Dávila & al. 2006
- =Eatonia obtusata var. purpurascens Vasey ex Rydb. & Shear in Bull. Div. Agrostol., U.S.D.A. 5: 30. 1897 syn. sec. Dávila & al. 2006
- =Eatonia pubescens Scribn. & Merr. in Bull. Div. Agrostol., U.S.D.A. 27: 6-7. 1900 syn. sec. Dávila & al. 2006
- =Eatonia robusta (Vasey ex L.H. Dewey) Rydb. in Bull. Torrey Bot. Club 32(11): 602. 1905 syn. sec. Dávila & al. 2006
- =Eatonia annua Suksd. in W. Amer. Sci. 15: 50. 1906 syn. sec. Dávila & al. 2006
- =Sphenopholis obtusata (Michx.) Scribn. f. obtusata in Rhodora 8(92): 144. 1906 syn. sec. Dávila & al. 2006
- =Sphenopholis obtusata subsp. lobata (Trin.) Scribn. in Rhodora 8(92): 144. 1906 syn. sec. Dávila & al. 2006
- =Sphenopholis obtusata subsp. pubescens (Scribn. & Merr.) Scribn. in Rhodora 8(92): 144. 1906 syn. sec. Dávila & al. 2006
- =Sphenopholis obtusata (Michx.) Scribn. var. obtusata in Rhodora 8(92): 144. 1906 syn. sec. Dávila & al. 2006
- =Sphenopholis obtusata var. lobata (Torr.) Scribn. ex B.L. Rob. in Rhodora 10(112): 65. 1908 syn. sec. Dávila & al. 2006
- =Sphenopholis obtusata var. pubescens (Scribn. & Merr.) Scribn. ex B.L. Rob. in Rhodora 10(112): 65. 1908 syn. sec. Dávila & al. 2006
- =Sphenopholis annua (Suksd.) A. Heller in Muhlenbergia 6: 12. 1910 syn. sec. Dávila & al. 2006
- =Sphenopholis pubescens (Scribn. & Merr.) A. Heller in Muhlenbergia 6: 12. 1910 syn. sec. Dávila & al. 2006
- =Sphenopholis robusta (Vasey ex L.H. Dewey) A. Heller in Muhlenbergia 6: 12. 1910 syn. sec. Dávila & al. 2006
- =Reboulea obtusata var. lobata Farw. in Rep. Michigan Acad. Sci. 17: 182. 1916 syn. sec. Dávila & al. 2006
- =Reboulea obtusata var. pubescens (Scribn. & Merr.) Farw. in Rep. Michigan Acad. Sci. 17: 181. 1916 syn. sec. Dávila & al. 2006
- =Sphenopholis obtusata f. purpurascens (Vasey ex Rydb. & Shear) Waterf. in Rhodora 50(592): 93. 1948 syn. sec. Dávila & al. 2006