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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.
The word pepper has its roots in the Dravidian word for long pepper, pippali. Ancient Greek and Latin turned pippali into the Latin piper, which was used by the Romans to refer both to black pepper and long pepper, as the Romans erroneously believed that both of these spices were derived from the same plant.