Calyx 9–12 mm long; teeth equalling or longer than the campanulate part, the two upper ones joined for most of their length to form an acute triangle with their apices free for only 1 mm.
Leaves pinnate with 7–13 pairs of leaflets; petiole and rachis shortly grey or brown tomentose; leaflets and stipules similar to those of T. praecana (see above).
Pods 52–60 × 7–8 mm, lanate-tomentose with the hairs grey at least at their tips.
Petals 13–17 mm long, purple; standard truncate to broadly cuneate at the base.
Young branches shortly grey or brown tomentose.
Ovary appressed-pubescent; style pubescent.
Stamen tube 9–10 mm long, fused above.
Shrub to 5 m high.
Seeds 5–6.