Rigid shrub up to 2 m. tall, with stout subcylindric branches and stout, erect, yellowish, deeply grooved branchlets with alt. notches, somewhat flattened, up to 1 cm. or more diam. Lvs small, rarely seen; of juveniles suborbicular, of adults about oblong. Infl. of up to 20 densely fascicled creamy fls with densely pilose pedicels and calyx. Calyx turbinate, bluntly 5-toothed, c. 4 mm. long; standard c. 5-6 mm. long, reflexed; keel about 6 mm. long, incurved, wings falcate, stouter than keel. Ovary villous, ovules 2-4. Pods c. 6-7 mm. long, us. one-seeded, ind.