Ononis spinosa :  n : Eurasian plant having loose racemes of pink or purple flowers and spiny stems and tough roots [syn: restharrow, rest-harrow, Ononis spinosa]

Cammock \Cam"mock\, n. [AS. cammoc.] (Bot.) A plant having long hard, crooked roots, the Ononis spinosa; -- called also rest-harrow. The Scandix Pecten-Veneris is also called cammock.