- buckthorn - a shrub or shrubby tree of the genus Rhamnus; fruits are source of yellow dyes or pigments
--1 is a kind of shrub, bush
--1 is a member of Rhamnus, genus Rhamnus
--1 has parts: buckthorn berry, yellow berry
--1 has particulars:- buckthorn - any shrub or small tree of the genus Bumelia
--2 is a kind of shrub, bush
--2 is a member of Bumelia, genus Bumelia
--2 has particulars:southern buckthorn, shittimwood, shittim, mock orange, Bumelia lycioides; false buckthorn, chittamwood, chittimwood, shittimwood, black haw, Bumelia lanuginosa - English plantain, narrow-leaved plantain, ribgrass, ribwort, ripple-grass, buckthorn, Plantago lanceolata - an Old World plantain with long narrow ribbed leaves widely established in temperate regions
--3 is a kind of plantain
- buckthorn - any shrub or small tree of the genus Bumelia