Bouteloua varia (Swallen) Columbus Bouteloua varia (Swallen) Columbus in Aliso 18(1): 63. 1999 sec. Dávila & al. 2018≡Cathestecum varium Swallen in J. Wash. Acad. Sci. 27(12): 498. 1937 syn. sec. Dávila & al. 2006