Opuntia galapageia is a species of cactus. It is endemic to the Galápagos Islands, part of Ecuador. Forms occurring on different islands have been treated as separate species and subtaxa of these species. Opuntia echios, Opuntia helleri, Opuntia insularis, Opuntia megasperma, Opuntia myriacantha and Opuntia saxicola are now sunk within O. galapageia.
Description
The variety Opuntia galapageia var. myriacantha, synonym Opuntia galapageia var. echios, has one of the longest spine lengths: up to 25 cm (10 in) in length, exceeded only by Ferocactus emoryi ssp. rectispinus at 33 cm (13 in).
