Phaseolus vulgaris is a species of leguminous plant in the family Fabaceae, commonly known as the common bean. It is native to Central and South America, with archaeological evidence indicating domestication in both Mesoamerican and Andean regions. The genus name Phaseolus derives from Latin, originally used for bean-like seeds, while the species epithet vulgaris means “common” in Latin, reflecting its widespread cultivation and dietary significance. This plant has been a staple food for millennia and remains one of the most important legume crops worldwide.

Phaseolus vulgaris is an annual herbaceous plant that produces climbing or bushy vines, pinnate leaves, and elongated pods containing seeds. The beans vary in size, shape, and color depending on the cultivar, ranging from white, red, black, and speckled varieties. Historically, the seeds have been consumed dried or fresh, while the pods are eaten as green beans in many culinary traditions. Cultivation spread from the Americas to Europe, Africa, and Asia following the Columbian exchange, and today Phaseolus vulgaris is grown in temperate and tropical regions worldwide.

Common beans are highly valued for their nutritional content. They provide a rich source of plant protein, complex carbohydrates, dietary fiber, vitamins such as folate and B1, and minerals including iron, magnesium, and potassium. The seeds also contain bioactive compounds such as lectins, flavonoids, and saponins, which can have beneficial antioxidant effects but may require proper cooking to reduce potential anti-nutritional activity or gastrointestinal upset. Common beans are used to produce a wide range of ingredients including dried beans for soups and stews, canned beans, refried beans, bean pastes, and green pods consumed as vegetables.