Peas. Peas are members of the legume family, which also includes a wide variety of beans. One of the main distinctions between peas and beans is that peas tend to grow in vines that require support, whereas most beans grow in self-supporting bushes.Peas also favor cooler climates than beans do.eas. Peas are members of the legume family, which also includes a wide variety of beans. One of the main distinctions between peas and beans is that peas tend to grow in vines that require support, whereas most beans grow in self-supporting bushes.