Echinocereus fendleri var. bonkerae (Thornber & Bonker) L.D.Benson in Proc. Calif. Acad. Sci., ser. 4, 25: 260. 1944
Echinocereus fendleri var. bonkerae in Proc. Calif. Acad. Sci., ser. 4, 25: 260. 1944
is new combination for Echinocereus bonkerae, Fantast. Clan: 71–73. 1932