A large shrub or small tree, Prunus spinosa, that is native to Europe, western Asia, and north Africa. It has a dark bark and bears thorns.
A stick or staff taken from this tree.
especially genus Rhamnus,
also genus Frangula, especially Frangula alnus, the alder buckthorn.
especially the common buckthorn or purging buckthorn; Rhamnus cathartica.
Hippophae (family Elaeagnaceae), the sea buckthorn.