Collinsonia (Stone root) is a flowering perennial native to North America with a habitat ranging all across the eastern United States and Canada. Part of the mint family, it produces small yellow flowers and can grow up to about four feet in height. The plant is notable for its distinct odor, described as having a lemony scent that is somewhat disagreeable. The root is very hard and heavy, difficult to pulverize or process into powder. The plant was discovered and named after English botanist Peter Collinson.