Panicum sublaeve Swallen Panicum sublaeve Swallen in Contr. U.S. Natl. Herb. 29(9): 424. 1950 sec. Dávila & al. 2018=Panicum rigidum Swallen in Ann. Missouri Bot. Gard. 30(2): 215. 1943 syn. sec. Dávila & al. 2006