Closely related to <I>A. doratoxylon</I> which has longer phyllodes without the reddish margins and occurs only in N.S.W. The description of <I>A. signata</I> by J. M. Black, FI.S. Aust. Pt.2. 425 (1948) is <I>A. olgana</I>. <I>Acacia signata</I> is endemic to W.Aust.