Lima bean

A lima bean (Phaseolus lunatus), also commonly known as butter bean, sieva bean, double bean or Madagascar bean, is a legume grown for its edible seeds or beans.

Although lima beans and butter beans are the same species, they are sometimes considered distinct in culinary use, the former being small and green, the latter large and yellow. In areas where both are considered to be lima beans, the green variety may be labeled as "baby" (and less commonly "junior") limas.

Origin and uses

Phaseolus lunatus is found in Meso- and South America. Two gene pools of cultivated lima beans point to independent domestication events. The Mesoamerican lima bean is distributed in neotropical lowlands, while the other is found in the western Andes. They were discovered in Peru and may have been the first plant that was brought up under civilization by the native farmers.

The Andean domestication took place around 2000 BC and produced a large-seeded variety (lima type), while the second, taking place in Mesoamerica around AD 800, produced a small-seeded variety (Sieva type). By around 1300, cultivation had spread north of the Rio Grande, and, in the 1500s, the plant began to be cultivated in the Old World.

The small-seeded (Sieva) type is found distributed from Mexico to Argentina, generally below 1,600 m (5,200 ft) above sea level, while the large-seeded wild form (lima type) is found distributed in the north of Peru, from 320 to 2,030 m (1,050 to 6,660 ft) above sea level.