Panicum longum Hitchc. & Chase in Contr. U.S. Natl. Herb. 15: 111, f. 106. 1910 sec. Dávila & al. 2018
- =Panicum macranthum Trin., Gram. Panic.: 209. 1826 syn. sec. Dávila & al. 2006
- =Panicum munitum Trin. ex Steud., Nomencl. Bot. (ed. 2) 2: 260. 1841 syn. sec. Dávila & al. 2006
- =Panicum pilosum var. macranthum Scribn. in Circ. Div. Agrostol. U.S.D.A. 19: 1. 1900 syn. sec. Dávila & al. 2006