Euphorbia apatzingana McVaugh Euphorbia apatzingana McVaugh in Brittonia 13(24): fig. 24. 1961 sec. Martínez-Gordillo & al. 2002=Chamaesyce apatzingana (McVaugh) McVaugh in Contr. Univ. Michigan Herb. 19: 211. 1993 syn. sec. Martínez-Gordillo & al. 2006