Allied to <I>Acacia wattsiana</I> (sp. 50) but this species differs in more flowers per head and narrow obovate phyllodes with an obtuse apex. <I>Acacia retinodes</I> var. <I>uncifolia</I> (sp. 48) is a closely allied species which differs in its acutely angular branches and more flowers per head and does not occur in the Flinders Ranges.