Waite Arboretum contains a number of trees which are rare or uncommon in public collections. One of these is waddy Acacia peuce which occurs naturally in only a few colonies east and west of the Simpson Desert in central Australia. The timber of this acacia is exceedingly hard and the tree is slow growing and very drought tolerant.
Another species which can survive on very low rainfall is Cape ebony Euclea pseudebenus. This attractive small tree with pendant branches is native to the arid areas of stony and sandy desert in South West Africa.