What is a plant having long hard, crooked roots, the Ononis spinosa; -- called also rest-harrow. The Scandix Pecten-Veneris is also called cammock called?

cammock — A plant having long hard, crooked roots, the Ononis spinosa; -- called also rest-harrow. The Scandix Pecten-Veneris is also called cammock. (Webster's 1913.)