verticil: a whorl of leaves growing around a stem
coil: a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
jerusalem thorn: 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