Opuntia echios var. echios
- 1. Köhler, M. 2021: Revisions of Airampoa, Brasiliopuntia, Opuntia, Salmonopuntia, Tacinga, Xiquexique. – In: Korotkova N. & al., Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family. – Willdenowia 51: 251-270. http://doi.org/10.3372/wi.51.51208
- =Opuntia galapageia var. echios, Cactaceae 1: 561. 1958, nom. illeg., syn. sec. Köhler 20212
- 2. Köhler, M. 2021: Revisions of Airampoa, Brasiliopuntia, Opuntia, Salmonopuntia, Tacinga, Xiquexique. – In: Korotkova N. & al., Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family. – Willdenowia 51: 251-270. http://doi.org/10.3372/wi.51.51208
- =Opuntia echios var. prolifera in Cact. Succ. J. (Los Angeles) 34: 104. 1962 syn. sec. Köhler 20213
- ≡Opuntia galapageia subvar. prolifera, Kakteenlex.: 317. 1966 syn. sec. Köhler 20213
- 3. Köhler, M. 2021: Revisions of Airampoa, Brasiliopuntia, Opuntia, Salmonopuntia, Tacinga, Xiquexique. – In: Korotkova N. & al., Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family. – Willdenowia 51: 251-270. http://doi.org/10.3372/wi.51.51208