Opuntia megacantha Salm-Dyck, Hort. Dyck.: 363. 1834 Opuntia megacantha Salm-Dyck, Hort. Dyck.: 363. 1834is basionym for Opuntia robusta var. megacantha (Salm-Dyck) Schelle, Handb. Kakteenkult.: 57. 1907Taxon for this nameOpuntia megacantha Salm-Dyck, Hort. Dyck.: 363. 1834