Red mulga is somewhat similar to three other species of mulga in S.Aust., <I>A. aneura</I> (sp. 111), <I>A. cibaria</I> (sp. 112) and <I>A. ramulosa</I> (sp. 107). The phyllodes and the flowers of these species are similar and they can be confused unless fruiting material is available or observation of habit can be made in the field.