Calamagrostis valida Sohns Calamagrostis valida Sohns in J. Wash. Acad. Sci. 46(12): 385, f. 47-55. 1956 sec. Dávila & al. 2018=Calamagrostis mcvaughii Sohns in J. Wash. Acad. Sci. 46(12): 382, f. 39-46. 1956 syn. sec. Dávila & al. 2006