Cercis occidentalis

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]