#buckthorn.shrub  a shrub or shrubby tree of the genus Rhamnus; fruits are source of yellow dyes or pigments
  supertype:  #shrub__bush  a low woody perennial plant usually having several major branches
  part:  #buckthorn_berry
  member of:  #genus_Rhamnus
  subtype:  #cascara_buckthorn__cascarabuckthorn__bearberry__bearwood__chittamwood__chittimwood__Rhamnus_purshianus  shrubby tree of United States Pacific coast; yields cascara sagrada
  subtype:  #Carolina_buckthorn__indian_cherry__Rhamnus_carolinianus  deciduous shrub of eastern and central United States having black berrylike fruit; golden-yellow in autumn
  subtype:  #coffeeberry__California_buckthorn__California_coffee__Rhamnus_californicus  evergreen shrub of western United States bearing small red or black fruits
  subtype:  #alder_buckthorn__alderbuckthorn__alder_dogwood__alderdogwood__Rhamnus_frangula  small tree common in Europe
  subtype:  #redberry__Rhamnus_croceus  small spiny evergreen shrub of western United States and Mexico with minute flowers and bright red berries

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