Acacia name change to Vachellia
'No more Acacias in Africa'
I have been rather tardy in applying the change of name for Acacias. I am really not qualified to explain this change in taxonomy but from my (limited) understanding, there is a difference between the Acacias of Africa and Asia compared to the Acacias of Australia. Suffice it to say that the name Acacia has been retained for the Australian wattle, while in Africa, the name Acacia has been replaced in most cases by Vachellia and in others by Senegalia.
If you feel the need for more information, I found the following website explained the situation in a reasonably simple manner and a link at the end of the article will lead you to list of the new species names: http://safari-ecology.blogspot.com/2011/07/vachellia-tortilis-or-why-there-are-no.html