The history of Bitter-leaf, vernonia amydalina, and its health benefits are still scraping the surface across the world. However, it is a very common plant amongst African Cultures. Wherever it grows, surely it flourishes. African History The Igbos call it Onugbu. The Yorubas call it Ewuro. The Hausas call it Shiwaka.The Igbos of Eastern Nigeria use the bitter-leaf mostly as a … Continue reading History and Health Benefits of Bitter Leaf.