A distinctive species related to <I>A. enterocarpa</I> (species 75) from which it differs in its shorter phyllodes, fewer veins, fewer peduncles per node, and legumes not folded in a single plane (jumping jack form). Superficially <I>A. rhigiophylla</I> may be confused with <I>A. hexaneura</I> but the former has more veins, flower-heads cylindrical with fewer 4-merous flowers, legumes curved and not undulate, seed with a yellow aril. <I>A. colletioides</I> and <I>A. nyssophylla</I> can be distinguished by their caducous stipules, and phyllodes 8- and 16- (or more)-veined. They also have a prominent yellow or orange aril.