Muhlenbergia orophila Swallen Muhlenbergia orophila Swallen in Contr. U.S. Natl. Herb. 29(9): 408. 1950 sec. Dávila & al. 2018=Muhlenbergia matudae Sohns in J. Wash. Acad. Sci. 46(12): 382, f. 32-38. 1956 syn. sec. Dávila & al. 2006