A climbing vine native to India and Indonesia, pepper is the world's most popular spice. The three varieties -- black, white and green -- are made depending on when the berries are processed. Black is the most common and the strongest in flavor. It is made when the not-quite-ripe berry is picked and then dried. The less pungent white peppercorn is created when the berry is ripened, the skin removed, and then dried. The fresh flavored green peppercorn is softer, and usually preserved in brine.