The western dry areas have the old-world leguminous Astragalus and Prosopis (Mesquit), but are especially characterized by the northward extension of the new-world tropical Cactaceae, Mgmmillaria, Cereus and Opuntia, by succulent Amar llideae such as A gave (of which the so-called American aloe is a type), and by arborescent Liliaceae (Yucca).
The agave or American aloe is cultivated in a similar manner throughout Andalusia.
The so-called American aloe has also been naturalized.
The most familiar species is Agave americana (see fig.), a native of tropical America, the so-called century plant or American aloe (the maguey of Mexico).