Panicum laxum Sw., Prodr.: 23. 1788 sec. Dávila & al. 2006
- =Panicum agrostidiforme Lam., Tabl. Encycl. 1: 172. 1791 syn. sec. Dávila & al. 2006
- =Panicum tenuiculmum G. Mey., Prim. Fl. Esseq.: 58. 1818 syn. sec. Dávila & al. 2006
- =Panicum leptomerum J. Presl, Reliq. Haenk. 1(4-5): 311. 1830 syn. sec. Dávila & al. 2006
- =Panicum diandrum Kunth, Révis. Gramin. 2: 383, t. 110. 1831 syn. sec. Dávila & al. 2006
- =Panicum psilanthum Steud., Syn. Pl. Glumac. 1: 66. 1853 syn. sec. Dávila & al. 2006
- =Panicum nigrescens Salzm. ex Steud., Syn. Pl. Glumac. 1: 66. 1854 syn. sec. Dávila & al. 2006
- =Panicum ramuliflorum Hochst. ex Steud., Syn. Pl. Glumac. 1: 65. 1854 syn. sec. Dávila & al. 2006
- =Vilfa gavana Steud. ex Lechl., Berberid. Amer. Austr.: 56. 1857 syn. sec. Dávila & al. 2006
- =Panicum pilosum var. epilosum E. Fourn., Mexic. Pl. 2: 24. 1886 syn. sec. Dávila & al. 2006
- =Panicum boliviense Hack. in Repert. Spec. Nov. Regni Veg. 11: 19. 1912 syn. sec. Dávila & al. 2006
- =Panicum luticola Hitchc. in Contr. U.S. Natl. Herb. 22(6): 485, f. 82. 1922 syn. sec. Dávila & al. 2006
- =Panicum hondurense Swallen in Contr. U.S. Natl. Herb. 29(6): 270. 1948 syn. sec. Dávila & al. 2006
- =Panicum caroniense Luces in Bol. Soc. Venez. Ci. Nat. 15.(80): 26-27, f. 18. 1953 syn. sec. Dávila & al. 2006
- =Panicum laxum var. vestitum L.B. Sm. & Wassh. in Bradea 2(35): 245. 1978 syn. sec. Dávila & al. 2006