Suberect shrub, branched from the base, 1-2 m. high; roots fasciculate, thick, fusiform, 20-30 x 4 cm. (fide Torre); young branchlets glabrous.
Racemes axillary, solitary, elongate, 12-20 cm. long; peduncle 1-2 cm. long; racemes produced together with the leaves.
Pods c. 10-12 x 2-2·5 cm., flat, subcoriaceous, falcately curved, with a stipe 1-1·5 cm. long.
Flowers purple, on pedicels 2-2·5 mm. long.
Stamen-filaments c. 5-6 mm. long.
Calyx c. 1 mm. long, glabrous.
Petals 4·5-5 mm. long.
Seeds c. 12 x 10 mm.