Flowers in axillary clusters, but leaves lacking at uppermost nodes so inflorescences continued as a short pseudoraceme; bracts similar to the stipules; pedicels 3–4(8 in fruit) mm long.
Petals 12–16 mm long; standard elliptic-obovate, yellow-green turning purple, with brown hairs on the back; wings purple; keel white.
Calyx 4–5 mm long, densely covered with short white appressed hairs; teeth broadly triangular, shorter than the tube.
Stems slightly ribbed, densely pubescent, the hairs silvery and mostly appressed, but some longer spreading hairs.
Erect much branched shrub to 1.5 m tall, with numerous stems from a woody rootstock, upper parts herbaceous.
Seeds 6–9, 4–4.5 × 3–3.5 mm, ovoid-oblong, ± transversely elongate, with a small hilum on the narrower end.
Pod 30–40 × 6–8 mm, oblong, with a stipe 3–4 mm long, densely pubescent, somewhat glabrescent at maturity.
Upper filament separate or only lightly attached to the staminal sheath.
Ovary tomentose; style pubescent.