1、 Leaves

Its leaves are pinnately compound, usually 15 to 30 cm long, and its petiole is 5 to 12 cm long. Its petiole is sparsely pilose, with 2 pairs of leaflets spaced 3 to 5 cm apart. Its leaves are papery, lanceolate, oblong or narrowly oblong, 5 to 15 cm long and 1.5 to 6 cm wide. Its apex is sharp or acuminate, occasionally blunt, and the base of the leaves is blunt and shiny

2、 Flowers

The panicle is terminal, the inflorescence is broad, about 40 cm long, the inflorescence axis is slightly yellow brown pilose, the flowers are solitary, the Corolla is purplish red, and the flag petal is broad ovate or inverted broad ovate

3、 Fruit

The pod is linear or oblong, 7 to 12 cm long and 1.5 to 2 cm wide. It is flat. The surface is densely covered with gray villi. The fruit petals are very thin, close to wood, with petals and 3 to 5 seeds