Smith, G.F. (Gideon Francois), 1959-; Figueiredo, Estrela; Boatwright, James S.; Crouch, Neil R.
(British Cactus and Succulent Society, 2011)
The history of Opuntia Mill. in South
Africa is well documented with invasive species of
this genus having been controlled for many years.
Despite these costly efforts some 12 species (13
taxa) of Opuntia are evidently ...