Peter Pepper. 10,000 - 23,000 Scoville Units. Capsicum annuum. The Peter pepper (sometimes referred to as the penis pepper) is an heirloom chili pepper that is best known for its phallic shape. It occurs in red and yellow varieties. The pepper is considered very rare, and its origin is unknown. The pepper is most commonly grown in eastern Texas and Louisiana, although it is grown in Mexico, as well.