Background and aims –Opuntia is the most widespread genus of Cactaceae, naturally occurring throughout arid and semi-arid areas of the Americas. Many of the species have taxonomic problems resulting ...

The prickly pear cactus is probably the most identifiable plant (besides the saguaro) in the Sonoran Desert. The species most often seen in the wild here is Engelmann prickly pear, or Opuntia ...

Invasibility depends on the interaction of the introduced species with the abiotic and biotic factors of the recipient community. In particular, the biotic resistance posed by native herbivores has ...