Source : Webster's Revised Unabridged Dictionary (1913)

Caper bush \Ca"per bush`\, Caper tree \Ca"per tree`\
   See {Capper}, a plant, 2.

Source : WordNet®

caper tree
     n 1: shrub or small tree of southern Florida to Central and South
          America [syn: {bay-leaved caper}, {Capparis flexuosa}]
     2: shrub of southern Florida to West Indies [syn: {Jamaica
        caper tree}, {Capparis cynophallophora}]