The real acacia tree, also known as wattle, thorntree, and whistling thorn, is a genus of trees and shrubs with over 1,000 species. While acacia trees can be found in Europe, Africa, southern Asia, and America most of the species are native to Australia. The cream or yellow colored flowers have five small petals, and they are arranged in dense cylindrical or globular clusters. However, there are also some species with unusually colored flowers such as white, purple or red colored flowers.