The Term Acacia used to be used for plants in Australia, Africa, the Americas and East-Asia but now is limited to Australian Acacias. This is due to the genus being seen on a molecular level as three different genera; Acacia, Vachillia and Senegalia. The decision not to change the Australian name was made due to it having 55% of the total genus, while East-Asia would most likely change to Senegalia leaving a substantially smaller number of Acacia. This shift was made at the benefit of the world because if they changed the name for all Australian Acacia the change would be far larger and cause a bigger shake up then it already
