Acacia nyssophylla (sp. 72) is very closely related and was considered a variety of A. colletioides by Bentham (1864). Acacia nyssophylla differs mainly in the phyllodes having many fine obscure closely placed veins. Acacia enterocarpa (sp. 75) can be distinguished by asperulate branches and phyllodes, also its prominently undulate legumes. Acacia rhigiophylla (sp. 96) has flattened phyllodes with 2-3 prominent veins.