Stiff shrub to 2 m tall with flat, spiny branches. Leaves alternate, consisting of a single leaflet 3-6 mm long, widest towards the tip. Flowers about 1 cm long, either all yellow, or the keel and base of other petals brown; spring. Ovary stalkless, with mostly 4 ovules. Fruit pod ovate to obovate, 1-2 cm long.
Source: (2002). Fabaceae. 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.