Jerusalem thorn

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A spiny tropical American tree (Parkinsonia aculeata) in the pea family, having yellow flowers and bipinnately compound leaves and widely cultivated as an ornamental.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu
• noun 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
• noun spiny tree having dark red edible fruits
• noun thorny Eurasian shrub with dry woody winged fruit