Runner bean

Runner bean
Scientific classification
Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Fabales Family: Fabaceae Subfamily: Faboideae Tribe: Phaseoleae Genus: Phaseolus Species: P. coccineus
Binomial name
Phaseolus coccineus L.

The runner bean (Phaseolus coccineus, Fabaceae) is often called the scarlet runner bean since most varieties have red flowers and multicolored seeds, though some have white flowers and white seeds. It differs from the common bean in several respects: the cotyledons stay in the ground during germination, and the plant is a perennial with tuberous roots (though it is usually treated as an annual). This species originated from the mountains of Central America.

The green pods are edible whole but in some varieties (the scarlet runner) tend to become fibrous early, and only the seeds within are eaten. The seeds can be used fresh or as dried beans. The starchy roots are still eaten by Central American Indians. In the UK, the flowers are often ignored, or treated as an attractive bonus to cultivating the plant for the beans, whereas in the US the scarlet runner is widely grown for its attractive flowers by people who would never think of eating it.^[1]

The flower of a scarlet runner bean

Runner beans contain traces of a poisonous lectin, Phytohaemagglutinin, and hence must be thoroughly cooked before consumption.^[2]

Phaseolus coccineus subsp. darwinianus is a cultivated subspecies of P. coccineus, it is commonly referred to as the Botil bean in Mexico.

Varieties

• Enorma
• Scarlet Runner
• Aztec Half-Runner, also called "Potato bean"
• White Dutch Runner
• Case Knife
• Black Runner
• Painted Lady
• Hammond's Dwarf
• Lady Di
• Pickwick Dwarf
• Riley
• Scarlet Emperor
• Sun Bright
• White Lady
• Wisley Magic
• White Swan

References

Wikimedia Commons has media related to: Phaseolus coccineus