Carex praegracilis W. Boott in Bot. Gaz. 9: 87-88. 1884 sec. González-Elizondo & al. 2018
- =Carex marcida Boott, Fl. bor.-amer. 2: 212-213, t. 213. 1839 syn. sec. Diego & González 2008
- =Carex gayana var. hyalina L.H. Bailey in Proc. Amer. Acad. Arts 22: 135-136. 1886 syn. sec. ???
- =Carex latebrosa Mack. in Bull. Torrey Bot. Club 34: 603-604. 1907 syn. sec. ???
- =Carex camporum Mack. in Bull. Torrey Bot. Club 37: 244. 1910 syn. sec. Diego & González 2008