Vigna is a genus of flowering plants in the legume family, Fabaceae, with a pantropical distribution. It includes some well-known cultivated species, including many types of beans. Some are former members of the genus Phaseolus
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Actually Moth (Vigna aconitifolia) is a bean. It is grown in India and Pakistan, But mainly in India. Moth flour is obviously grounded version of these Moth beans. Moth Beans are very useful. They are used to make Dalia ( or Bulgur), which is ready-to-eat food for North Indians