horsebean(n = noun.plant) jerusalem thorn, parkinsonia aculeata - large shrub or shrubby tree having sharp spines and pinnate leaves with small deciduous leaflets and sweet-scented racemose yellow-orange flowers; grown as ornamentals or hedging or emergency food for livestock; tropical America but naturalized in southern United States;
A large shrub or shrubby tree (Parkinsonia aculeata) having sharp spines and pinnate leaves with small deciduous leaflets and sweet-scented racemose yellow-orange flowers; grown as ornamentals or hedging or emergency food for livestock; originating in tropical America but naturalized in the Southern U. S. [WordNet 1.5]