Echinocereus cinerascens (DC.) Lem. Echinocereus cinerascens (DC.) Lem., Cact. Gen. Sp. Nov.: 56. 1839 sec. Guzmán & al. 2003≡Cereus cinerascens DC. in Mém. Mus. Hist. Nat. 17: 116. 1828 syn. sec. Guzmán & al. 2003