Euphorbia cinerascens Engelm. in Rep. U.S. Mex. Bound. 2(1): 186-187. 1859 sec. Martínez-Gordillo & al. 2002
- =Euphorbia melanadenia var. subinappendiculata Engelm., Proc. Amer. Acad. Arts 5. 1861 syn. sec. Martínez-Gordillo & al. 2006
- =Chamaesyce cinerascens (Engelm.) Small, Fl. S.E. U.S. 1903 syn. sec. Martínez-Gordillo & al. 2006