Carex albicans var. australis (L.H. Bailey) Rettig in Sida 14: 133. 1990 sec. González-Elizondo & al. 2018
- =Carex rhynchophysa Liebm. in Kongel. Danske Vidensk.-Selsk. Skr. 5. 2 (Mexic. Halvgr.): 264-265. 1850 syn. sec. Diego & González 2008
- =Carex nigromarginata f. minor Boeckeler in Bot. Jahrb. Syst. 1: 364. 1881 syn. sec. Diego & González 2008
- =Carex physorhyncha Liebm. ex Steud., Syn. pl. glumac. 2: 219. 1885 syn. sec. Diego & González 2008
- =Carex emmonsii var. australis (L.H. Bailey) Rettig in Sida 13: 452. 1989 syn. sec. Diego & González 2008