dog bramble
/ˈdɒɡ ˌbrambl/(also dog's bramble)
noun
Any of various thorny shrubs; specifically †(a) the caper bush, Capparis spinosa ( obsolete ).
Origin
Mid 16th century; earliest use found in John Maplet (d. 1592), writer on natural philosophy. In some forms from the genitive of dog + bramble. In some forms from dog + bramble.