Black pepper (Piper nigrum) is said to have originated on the Malabar coast of India, where it grew on vines attached to trees. The spice migrated east with Indian traders following the monsoons, and became established as a crop in Java and the Sunda Islands and then in Malaysia, Borneo, Sumatra, Sri Lanka, and Penang. Today it is also grown in Thailand, tropical Africa, the South Sea Islands, and Brazil.
Pepper vines bear white flowers on spikes, becoming peppercorns that look like small clusters of berries. The peppercorns ripen from green to red and then to brown; green peppercorns become black peppercorns when dried in the sun. Black pepper owes its pungency to a resin and its flavor to a volatile oil. Most of the pungent flavor of the black peppercorn is in its skin. Green peppercorns are picked unripe, and sold dry or pickled in vinegar or brine. White pepper is formed by soaking fresh berries in salt water, removing their red shells by hand, and then drying them. Some say white peppercorn is milder than black and is a more favorable spice. Gray pepper is most often a ground mix of black and white peppercorns.