Ononis spinosa is a plant belonging to the family Fabaceae, that is commonly known as spiny restharrow or just restharrow. It is found throughout much of Europe including Britain, but seldom as far north as Scotland.
Spiny restharrow is an erect, bushy perennial. The wiry, branched stem is downy and nearly always spiny, and grows to a height of 18 in (46 cm). The leaves are small, dark green, oval or trefoil, with toothed leaf-like stipules at their base. The flowers are deep pink and white, with the wings shorter than the hooked keel, and the calyx usually shorter than the pod.