The white heath (Erica arborea), a thorny Mediterranean shrub.
Any of many plants with thorny stems growing in dense clusters, such as many in the Rosa, Rubus, and Smilax genera.
Anything sharp or unpleasant to the feelings.
A pipe for smoking, made from the roots of that shrub.
Evergreen shrub, of the genus Ulex, having spiny leaves and yellow flowers.