A map showing the distribution of Mimosaceae in Western Australia here.
There is a page on the Mimosaceae family in Flora of Australia Online.
A note on the Mimosaceae family in the Wikipedia here. - showing Mimisoideae as a subfamily of the family Fabaceae. This is not a 'mistake', but a different classification system, APGII.]
A map showing the distribution of Acacia
in Western Australia here
A note on the Acacia genus in the Wikipedia
A general ANBG page on the genus Acacia.