My neighbour brought back a stem cutting of this plant from a monastery in Penang where she went for meditation about a year ago. The cutting has grown big and tall and then she planted some more cuttings near the fence. She calls them the African Leaves and she has never seen flowers being produced by this plant. She uses the leaves and boils them to drink and also uses the dried leaves to make a tea concoction. She used to have high cholesterol and high blood pressure and after drinking the potion boiled from these leaves she said that she doesn't suffer from high cholesterol and high blood pressure anymore. So far, this plant has not been identified yet ... anyone can help me identify it?