Rhamnus purshianus

from WordNet (r) 3.0 (2006)

Rhamnus purshianus
    n 1: shrubby tree of the Pacific coast of the United States;
         yields cascara sagrada [syn: {cascara buckthorn},
         {bearberry}, {bearwood}, {chittamwood}, {chittimwood},
         {Rhamnus purshianus}]

from The Collaborative International Dictionary of English v.0.48

Rhamnus \Rham"nus\, n. [NL., from Gr. "ra`mnos a kind of prickly
   shrub; cf. L. rhamnos.] (Bot.)
   A genus of shrubs and small trees; buckthorn. The California
   {Rhamnus Purshianus} and the European {Rhamnus catharticus}
   are used in medicine. The latter is used for hedges.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Cascara sagrada \Cas"ca*ra sa*gra"da\ (k[.a]s"k[.a]*r[.a]
   s[.a]*gr[aum]"d[.a]). [Sp.]
   Holy bark; the bark of the California buckthorn ({Rhamnus
   Purshianus}), used as a mild cathartic or laxative; -- called
   also {cascara}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

chittamwood \chittamwood\ n.
   1. a shrubby tree of the U. S. Pacific coast ({Rhamnus
      purshianus} or {Rhamnus purshiana}), whose bark is the
      {cascara sagrada}, used as a mild cathartic or laxative.

   Syn: cascara, cascara buckthorn, bearberry, bearwood,
        chittimwood, {Rhamnus purshianus}.
        [WordNet 1.5]

   2. a deciduous tree of SE U.S. and Mexico.

   Syn: false buckthorn, chittimwood, shittimwood, black haw,
        Bumelia lanuginosa.
        [WordNet 1.5]

   3. a shrubby tree of southern U.S. ({Cotinus obovatus})
      having large plumes of feathery flowers resembling puffs
      of smoke; -- called also {American smoke tree}.

   Syn: American smokewood, {Cotinus americanus}, {Cotinus
        obovatus}.
        [WordNet 1.5]