Gouania lupuloides, known as chewstick, is a plant of the family Rhamnaceae. The name in Jamaica for a vine with a woody stem which grows in hedgerows in the hills. In Jamaican patois a vine is called a wis (wythie). To clean one's teeth with this plant one cuts off a portion of the vine, peels off the bark and chews the tip. The tip becomes fibrous and frothy. Chewstick tastes slightly bitter but not unpleasant....