Cereus eburneus var. monstrosus Salm-Dyck ex DC., Prodr. 3: 465. 1828
Cereus eburneus var. monstrosus, Prodr. 3: 465. 1828
is basionym for Rathbunia grisea var. monstrosa in Calyx 2: 104. 1992
is basionym for Stenocereus griseus var. monstrosus in Calyx 5: 101. 1996