This plant, an Eastern North American native, has been used as an excellent remedy for colds and intermittent fever, especially flu with body aches. Medical evidence suggests that it enhances the immune system. It is not recommended for long term use. Easy to grow, it appreciates part shade in hot summer climates and likes to be watered frequently. Pretty green textured leaves give way to white umbel shaped flowers. Harvest and use flowering tops and leaves for tea or tincturing. Hardy to Zones 3-8.