Vegetable of 20^th century was

The vegetable of the 20^th century was the Winged bean.
It is a tropical herbaceous legume plant. The Winged bean is nutrient-rich and all parts of the plant are edible. The leaves can be eaten like spinach, flowers can be used in salads, tubers can be eaten raw or cooked and seeds can be used in similar ways as the soybean.
Each of these parts contains vitamin A, vitamin C, calcium and iron, among other nutrients. The beans are rich not only in protein but in tocopherols (antioxidants that facilitate vitamin-A utilization in the body).