judas tree

from WordNet (r) 3.0 (2006)

Judas tree
    n 1: small tree of the eastern Mediterranean having abundant
         purplish-red flowers growing on old wood directly from
         stems and appearing before the leaves: widely cultivated in
         mild regions; wood valuable for veneers [syn: {Judas tree},
         {love tree}, {Circis siliquastrum}]

from The Collaborative International Dictionary of English v.0.48

Judas \Ju"das\, n.
   The disciple who betrayed Christ. Hence: A treacherous
   person; one who betrays under the semblance of friendship. --
   a. Treacherous; betraying.
   [1913 Webster]

   {Judas hole}, a peephole or secret opening for spying.

   {Judas kiss},
   (a) a deceitful and treacherous kiss.
   (b) an act appearing to be an act of friendship, which is in
       fact harmful to the recipient.

   {Judas tree} (Bot.), a leguminous tree of the genus {Cercis},
      with pretty, rose-colored flowers in clusters along the
      branches. Judas is said to have hanged himself on a tree
      of this genus ({Cercis Siliquastrum}). {Cercis Canadensis}
      and {Cercis occidentalis} are the American species, and
      are called also {redbud}.
      [1913 Webster]