Muhlenbergia rigens (Benth.) Hitchc. in J. Wash. Acad. Sci. 23(10): 453. 1933 sec. Dávila & al. 2018
- ≡Epicampes rigens Benth. in J. Linn. Soc., Bot. 19: 88. 1881 syn. sec. Dávila & al. 2006
- =Epicampes leptoura Piper in Proc. Biol. Soc. Wash. 18: 143. 1905 syn. sec. Dávila & al. 2006
- =Muhlenbergia leptoura (Piper) Hitchc., N. Amer. Fl. 17(6): 468. 1935 syn. sec. Dávila & al. 2006
- =Muhlenbergia marshii I.M. Johnst. in J. Arnold Arbor. 24(4): 392. 1943 syn. sec. Dávila & al. 2006
- =Muhlenbergia mundula I.M. Johnst. in J. Arnold Arbor. 24(4): 392-393. 1943 syn. sec. Dávila & al. 2006