Believed to be native to the high altitude regions of Central America, the English Runner beans are long and flat, and have a bright green exterior which encases a crisp, slightly juicy interior and petite undeveloped seeds or beans. Besides, these vining perennials contain vitamin K, folate, vitamin C and manganese. As a matter of fact, all green beans may help reduce the risk of heart diseases due to their high levels of flavonoidsn, which in turn contain certain anti-inflammatory properties.