The Banaba Bush, known in the United States as
Crape Myrtle (or Crepe Myrtle), has become widespread in temperate regions of the country and is prized as an ornamental. Banaba extract, obtained from the leaves of the plant, is high in plant insulin, known as corosolic acid. Herbalists claim that the extract produces anti-diabetic effects when consumed by humans in the form of dietary supplements, juices or teas.
I had no idea that the leaves were edible. I have four in my yard. I have to surround them with fence wire to keep the deer from eating the leaves, until they get taller.