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Serrano pepper. The serrano pepper (Capsicum annuum) is a type of chili pepper that originated in the mountainous regions of the Mexican states of Puebla and Hidalgo. The name of the pepper is a reference to the mountains (sierras) of these regions.
Inhabitants of Mexico, Central America and South America had chili peppers more than 6,000 years ago. Within decades of contact with Spain and Portugal in the 16th century, the American plant was carried across Europe and into Africa and Asia, and altered through selective breeding.