Aloe, a genus of succulent plants belonging to the natural order liliaceae and tribe asphode-leae, with long, fleshy, narrow, toothed leaves, growing in tropical countries. It has been divided into a variety of species, consisting of trees, shrubs, and evergreen herbaceous plants, which differ in height from a few inches to upward of 30 feet, and no less widely in the character of their leaves and flowers. A large proportion of these different species have no medicinal properties, but are seen as objects of curiosity, in collections of succulent plants; while a few species are highly valued for the juice of their leaves, which forms the aloes of commerce. (See Aloes.)