Chili pepper
Chili peppers, also spelled chile or chilli , are varieties of the berry-fruit of plants from the genus Capsicum, which are members of the nightshade family Solanaceae, cultivated for their pungency. Chili peppers are widely used in many cuisines as a spice to add "heat" to dishes. Capsaicin and related compounds known as capsaicinoids are the substances that give chili peppers their intensity when ingested or applied topically. Chili peppers exhibit a range of heat and flavors. This diversity is the reason behind the availability of different types of paprika and chili powder, each offering its own taste and heat level. Chili peppers are believed to have originated in Central or South America and were first cultivated in Mexico. European explorers brought chili peppers back to the Old World in the late 16th century as part of the Columbian Exchange, which led to many cultivars spreading around the world and finding use in both food and traditional medicine. This led to a variety of cultivars, including the annuum species, with its glabriusculum variety and New Mexico cultivar group, and the species of baccatum, chinense, frutescens, and pubescens.
Source: Wikipedia