Shrub to 2 m tall,with zig-zag branches that have fine ribbing and 1-2 spines at most axils. Leaves bipinnate, with 1 pair of branches and 3-8 pairs of 1-5 mm-long leaflets on each. Flower heads globular, of 24-43 5-parted flowers; winter to spring. Fruit pods narrowly oblong, 2-4.5 cm long, 1.5-3 mm wide.
A. drewiana W.V. Fitzg. from WA has bluish leaflets on a curved axis; A. lasiocarpa Benth. from WA has strongly recurved, almost cylindrical leaves.
Source: (2002). Mimosaceae. In: . Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.