Opuntia monacantha, commonly known as drooping prickly pear, cochineal prickly pear, or Barbary fig, is a species of plant in the family Cactaceae. It is native to Argentina, Brazil, Paraguay, and Uruguay.
Opuntia monacantha is a very quick-growing shrubby or tree-like succulent 2-4 (6) m tall with a short trunk up to 2 dm in diameter. Its natural habitats are subtropical or tropical moist lowland forest and sandy shores. The species was first formally described in 1812 by botanist Adrian Haworth. The name Opuntia vulgaris, which is a synonym of Opuntia ficus-indica, has been misapplied to this species in Australia. It is a low maintenance plant that tolerate considerable neglect and will naturalize. Easy to cultivate outdoor in warm dry climates.