Tetramerium langlassei Happ in Ann. Missouri Bot. Gard. 24(4): 523. 1937 sec. Sosa 1995
- =Tetramerium macrostachyum Happ in Ann. Missouri Bot. Gard. 24(4): 520. 1937 syn. sec. The Plant List 2013
- =Tetramerium sessilifolium Happ in Ann. Missouri Bot. Gard. 24(4): 522. 1937 syn. sec. ???