Acacia rivalis (sp. 42) is closely related in flower and legume characters but differs in having flat, shorter phyllodes. Acacia juncifolia is similar in habit and phyllode characters but differs in flower and legume characters. It occurs in N T., Qld and N.S.W. but not in S.Aust. A. harveyi has flat phyllodes less than 10 cm long--endemic in Western Australia.