Armed, low shrub, branches spiny. Leaf simple, entire, stipules small. Inflorescence an axillary raceme, rachis spinescent at the tip. Bracts small, bracteoles absent. Calyx gamosepalous, teeth subequal. Corolla red or pink, vexillum and keel longer than the wings. Stamens diadelphous, 9+1, anthers uniform. Fruit 1-9-seeded, often constricted between the seeds and divided inside by septa.