Calyx 6–13 mm long, appressed or ascending-pubescent, with or without conspicuously longer spreading hairs; teeth very variable, from 2 mm long and shorter than the tube to 7 mm and exceeding the tube, the upper two variously joined.
Inflorescence lax to fairly dense, the bracts falling before the opening of the subtended flower; bracts ovate-acuminate to linear-lanceolate; pedicels (7)10–20 mm long, indumentum as for young stem (longer hairs rarely absent).
Young stem with short light coloured spreading or appressed hairs interspersed with conspicuous long spreading or upwardly curved (rarely appressed) brown hairs.
Seeds c.8, blackish, 6 × 3.2 mm, oblong with rounded ends, with a low rim aril in the middle of a long side.
Pods 4–6 × c.0.6 cm, variously brown or greyish villous (see subspecies).
Petals 16–24 mm long, purple; standard broadly cuneate at the base.
Ovary ± appressed-tomentose or villous; style pubescent.
Shrub up to 4 m high.