From Wikipedia,
Acacia
Species
About 1,300; see List of Acacia species
Acacia is a genus of shrubs and trees belonging to the subfamily Mimosoideae of the family Fabaceae, first described in Africa by the Swedish botanist Carolus Linnaeus in 1773. The plants tend to be thorny and pod-bearing. The name derives from ακις (akis) which is Greek for a sharp point, due to the thorns in the type-species Acacia nilotica ("Nile Acacia") from Egypt. [1]
Acacias are also known as thorntrees or wattles, including the yellow-fever acacia and umbrella acacias.
There are roughly 1300 species of Acacia worldwide, about 960 of them native to Australia, with the remainder spread around the tropical to warm-temperate regions of both hemispheres, including Africa, southern Asia, and the Americas.
Some Acacia species are valuable as timber, such as Acacia melanoxylon (Blackwood) from Australia, which attains a great size; its wood is used for furniture, and takes a high polish; and Acacia omalophylla (Myall Wood, also Australian), which yields a fragrant timber used for ornaments. Acacia seyal is thought to be the ****tah-tree of the Bible, which supplied ****tim-wood. According to the Book of Exodus, this was used in the construction of the Ark of the Covenant. Acacia koa from the Hawaiian Islands and Acacia heterophylla from Réunion island are both excellent timber trees.