Sorghastrum incompletum (J. Presl) Nash var. incompletum, N. Amer. Fl. 17(2): 130. 1912 sec. Dávila & al. 2018
- =Sorghastrum incompletum var. bipennatum (Hack.) Dávila in Ann. Missouri Bot. Gard. 76: 1171. 1989 syn. sec. Dávila & al. 2006
- =Sorghastrum nutans subvar. canescens (Hack.) Roberty syn. sec. Dávila & al. 2006