Muhlenbergia virletii (E. Fourn.) Soderstr. Muhlenbergia virletii (E. Fourn.) Soderstr. in Contr. U.S. Natl. Herb. 34(4): 157. 1967 sec. Dávila & al. 2018≡Epicampes virletii E. Fourn., Mexic. Pl. 2: 88. 1886 syn. sec. Dávila & al. 2006