Tepin Pepper Seeds they are also called Chiltepin, very hot; 0.25 inches round/wide, matures from dark green to red, thin-skinned upright fruits, usually harvested in the wild of southwest US and northern Mexico, Called the "mother of all peppers". It is thought to be the oldest in the C. annuum species. This chile has a long history, the word Tepin is from the Nahuatl language of the Aztec Indians, meaning "flea" because of its smallness. In Mexico, the heat of the Chiltepin is called arrebatado (rapid or violent), which implies that although the heat is intense, it quickly diminishes. Late season fruiting, 200 days (must start early indoors). C.annuum.