Populations of Aloe vera that exist elsewhere from Africa are the result of human cultivation

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source: http://en.wikipedia.org/wiki/Aloe_vera

Aloe vera is a member of the Aloe species and originates from Africa. The species is distributed throughout North Africa in Algeria, Morocco, and Tunisia, along with the Canary and Madeira Islands. Populations of Aloe vera that exist elsewhere from Africa are the result of human cultivation. The species was first brought into China, India, Pakistan and several parts of southern Europe. The species is adapted to temperate and tropical regions of Australia, Barbados, Belize, Nigeria, Paraguay and the USA. It is adaptable and found in many warm, dry climates. Aloe Vera is a tropical plant with its root surviving freezing air temperatures but if the ground is frozen, the root will be destroyed. The plant’s root cannot stand in water or it will drown. It can grow at temperatures as high as 104 F and is able to endure extreme hot temperatures and even severe drought. The Aloe vera plant itself does not need to be destroyed to cause damage. The leaves can also be ruined at air temperatures of 40 F and severe damage occurs at 35 F. During winter, Aloe vera may become dormant and very little moisture is needed. In areas that receive frost or snow the species is usually found indoors or in heated glasshouses. The Aloe species is a leaf and stem succulent plant that looks like a cactus with thick and fleshy leaves. The plant has been used as a herbal medicine in the treatment of burns. The gel found in the lower leaf of the Aloe vera can be used to cool and heal burn wounds. Aloe drinks have become popular because internal intake has been linked with improved blood glucose levels in diabetics and lower blood lipids in hyperlipidaemic patients.

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