Plant with spiny leaves is a term used to describe three different plants: AGAVE (5 letters), Eryngo (6 letters), and Aloe (4 letters). AGAVE is a succulent plant native to the hot, dry climates of Mexico and the southwestern United States. Eryngo is a perennial herb native to Europe, North Africa, and parts of Asia. Aloe is a succulent plant native to Africa, Madagascar, and the Arabian Peninsula. All three plants have spiny leaves and are popularly used in landscaping and gardening.