Capsicum annuum, commonly known as the chili or bell pepper plant, is a domesticated member of the nightshade family (Solanaceae) native to tropical and subtropical regions of the Americas. It is a herbaceous annual or short-lived perennial, typically grown as a small shrub. The plant is famous for its edible fruits, which vary dramatically in size, shape, color, and pungency—from sweet bell peppers to fiery chili peppers. It has been cultivated for thousands of years and is now one of the most widely grown vegetable crops worldwide, valued for its culinary, medicinal, and ornamental uses.

While Capsicum annuum is a cornerstone of global agriculture and not a major invasive threat, it does possess some traits that require careful management in sensitive ecosystems. Its seeds are easily spread by birds, and weedy, wild forms exist that can colonize disturbed areas like roadsides. The plant can also hybridize with wild relatives. For these reasons, it is recommended to prevent the spread of seeds into natural areas in regions like Hawaiʻi. When planting, use only non-invasive, well-managed varieties and dispose of plant waste responsibly to minimize any risk of unwanted establishment.