Echinocactus recurvus var. solenacanthus (Scheidw.) Salm-Dyck, Cact. Hort. Dyck., ed. 1844: 21. 1845
Echinocactus recurvus var. solenacanthus, Cact. Hort. Dyck., ed. 1844: 21. 1845
is new combination for Echinocactus solenacanthus in Allg. Gartenzeitung 9: 50. 1841