What causes thunderstorms? Thunderstorms form when an air mass becomes so unstable that it overturns (convects) violently. Unstable means that the air in the lowest layers is unusually warm and humid, or that the upper layers are unusually cool, or oftentimes, both.
Aloe is the name of a plant genus that contains more than 300 species. Most of the aloe species are native to Africa, Madagascar and the Arabian Peninsula. In addition to the familiar cactus-like plant called aloe vera that many people use to soothe sunburns and other skin ailments, this genus has plants that range from grassy succulents to large trees.
The genus Aloe consists of approximately 450 species that occur in Africa, Madagascar, and the Arabian Peninsula. Aloes range in size from diminutive pot plants to large trees and massive clumps. The plants are characterized by rosettes of fleshy succulent leaves, which can grow close to the ground, or on branched and un-branched stems. There are variations: A. plicatilis, is distichous, while the unusual A. polyphylla from Lesotho grows in spirals.