#buckthorn  any shrub or small tree of the genus Bumelia
  supertype:  shrub__bush  a low woody perennial plant usually having several major branches
  member of:  genus_Bumelia
  subtype:  southern_buckthorn__shittimwood__mock_orange__mockorange__Bumelia_lycioides  shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit
  subtype:  false_buckthorn__falsebuckthorn__chittamwood__chittimwood__shittimwood__blackhaw__Bumelia_lanuginosa  deciduous tree of southeastern United States and Mexico

No statement uses or specializes buckthorn; click here to add one.