| Schizachyrium sanguineum var. oligostachyum (Chapm.) S.L. Hatch, 1978 |
| Schizachyrium sanguineum var. sanguineum (Retz.) Alston, 1931 |
| Schizachyrium sanguineum var. sanguineum subvar. domingense (Spreng. ex Schult.) Roberty, 1960 |
| Schizachyrium scabriflorum (Hack.) A. Camus, 1924 |
| Schizachyrium schottii (Rupr. ex Hack.) Nash, 1912 |
| Schizachyrium scoparium (Michx.) Nash, 1903 |
| Schizachyrium scoparium f. calvescens (Fernald) C.F. Reed, 1989 |
| Schizachyrium scoparium f. villosissimum (Kearney) C.F. Reed, 1989 |
| Schizachyrium scoparium subsp. littorale (Nash) Gandhi & Smeins, 1996 |
| Schizachyrium scoparium subsp. neomexicanum (Nash) Gandhi & Smeins, 1996 |
| Schizachyrium scoparium var. frequens (F.T. Hubb.) Gould, 1967 |
| Schizachyrium scoparium var. littorale (Nash) Gould, 1967 |
| Schizachyrium scoparium var. neomexicanum (Nash) Gould, 1967 |
| Schizachyrium scoparium var. neomexicanum (Nash) Hitchc., 1928 |
| Schizachyrium scoparium var. polycladum (Scribn. & C.R. Ball) C.F. Reed, 1987 |
| Schizachyrium scoparium var. scoparium (Michx.) Nash, 1903 |
| Schizachyrium semiberbe Nees, 1829 |
| Schizachyrium semiglabrum Nash, 1912 |
| Schizachyrium semitectum (Swallen) Reeder, 1984 |
| Schizachyrium spadiceum (Swallen) Wipff, 1996 |