Green bell peppers are members of the domesticated plant species Capsicum annuum . Green, yellow, orange and red bell peppers all belong to the same species, with the differences arising from the time at which they are harvested. Green bell peppers are bell peppers that have been harvested early. Yellow and orange bell peppers have been allowed more time to ripen, and red bell peppers are the most mature. Capsicum annuum is a domesticated species of the plant genus Capsicum native to southern North America and northern South America. The three species C. annuum , C. frutescens and C. chinense all evolved from a single common ancestor located somewhere in the northwest Brazil - Colombia area. Capsicum annuum is the most common and extensively cultivated of the five domesticated capsicums Common Names: in English : aromatic hot pepper, aromatic pepper, bell pepper, bird pepper, bonnet pepper, capsicum, Ca...