Invasive species compendium.

Abstract Agave fourcroydes is a perennial succulent plant that has been extensively cultivated for fibre production (sisal) and as an ornamental. This species is adapted to a wide variety of habitats and spreads easily by bulbils and offshoots from rhizomes. These traits are thought to help the species escape cultivation and easily colonize and become naturalized in new habitats. It is currently listed as invasive in Spain, the Canary Islands and Cuba, where it is described as a species that is spreading, and often forms dense monospecific stands that displace native vegetation.