A genus (Rhamnus) of shrubs or trees. The shorter branches of some species terminate in long spines or thorns. See Rhamnus.

A woody shrub or tree of the genus Rhamnus used as a source of yellow and green dyes.

Rhamnus cathartica, a large shrub or small tree with spreading branches that may be tipped with spines. It is also called Common Buckthorn and European Buckthorn.

an Old World plantain with long narrow ribbed leaves widely established in temperate regions