Gynura procumbens 

Longevity Spinach is native to China, Southeast Asia, and parts of Africa where it's known locally as Sambungal or Sambung Nyawa which translates into English as "Life Extender".  This tropical to sub-tropical plant loves the heat and tolerates a variety of different soils and light conditions. It can be eaten raw or cooked and is the focus of extensive pharmacological research for its numerous health benefits.