The cayenne, or Guinea pepper or bird pepper is a hot, red chili pepper used to flavour dishes. Named for the city of Cayenne in French Guiana, it is a cultivar of Capsicum annuum related to bell peppers, jalapeños, and others. The Capsicum genus is in the nightshade family (Solanaceae).
Cayenne is used in cooking spicy dishes, as a powder or in its whole form (such as in Sichuan cuisine) or in a thin, vinegar-based sauce. It is generally rated at 30,000 to 50,000 Scoville Units. It is also used as a herbal supplement, and was mentioned by Nicholas Culpeper in his 17th century book Complete Herbal.