Capsicum annuum is a species of the plant genus Capsicum native to southern North America and northern South America. This species is the most common and extensively cultivated of the five domesticated capsicums. The species encompasses a wide variety of shapes and sizes of peppers, both mild and hot, such as bell peppers, jalapeños, and cayenne peppers.
The species is a source of popular sweet peppers and hot chilis with numerous varieties cultivated all around the world, and is the source of popular spices such as cayenne, chili, and paprika powders.
Common naming in English falls generally in line with the flavor and size of the variant. Larger, sweeter variants are called "capsicums" in Australia, sweet peppers in Great Britain, and red or green peppers, or "bell peppers" in the United States. The smaller, hotter varieties are called chillis, chilies, chile, or chili peppers, or in parts of the US, 'peppers'.