Schizachyrium semitectum (Swallen) Reeder Schizachyrium semitectum (Swallen) Reeder in Phytologia 55(4): 252. 1984 sec. Dávila & al. 2018≡Andropogon semitectus Swallen in Contr. U.S. Natl. Herb. 29(9): 427. 1950 syn. sec. Dávila & al. 2006