Petitgrain oil, << PEHT ee `grayn,` >> is an oil made by distilling the leaves and sometimes the twigs of the bitter orange tree. It is used in soaps and in cosmetics. Paraguay is the major supplier of petitgrain oil, but the finest oil is produced in southern France. Petitgrain oil also comes from Guinea, Haiti, Spain, and Italy. Petitgrain bigarade, an oil more valuable than petitgrain oil, is made from the bigarade orange tree, a variety of the bitter orange.