The Australian tree with edible nuts is the Macadamia, which is a genus of four species of trees indigenous to Australia and constituting part of the plant family Proteaceae. The Macadamia nut is the edible seed of the Macadamia tree, and is native to southeastern Queensland and northeastern New South Wales in Australia. It is now cultivated worldwide for its nuts, and is also used in various industries such as cosmetics and food production.