This species was included within <I>A. calamifolia</I> in the first edition. It is closely related to wallowa and the two are discussed in detail in Maslin &amp; Whibley (1987). Probable hybrids with <I>A. anceps</I> are recorded from a few localities. It is a variable species that needs more detailed study.

<P>The peduncles of <I>A. nematophylla</I> are always solitary in the axils of the phyllodes compared with the short axillary racemes of <I>A. calamifolia</I>.

<P>The phyllodes of <I>A. nematophylla</I> are frequently short and tend to dry more coarsely wrinkled than those of <I>A. calamifolia</I>. The two species do not normally overlap in their distribution.