Withania somnifera, known commonly as ashwagandha, Indian ginseng, poison gooseberry, or winter cherry, is a plant in the Solanaceae or nightshade family. Several other species in the genus Withania are morphologically similar. Although thought to be useful as a medicinal herb in Ayurveda, there is no conclusive clinical evidence that it is effective for treating any ailment. Ashwagandha is an evergreen shrub that grows in India, the Middle East, and parts of Africa. Its roots and orange-red fruit have been used for hundreds of years for medicinal purposes. The herb is also called Indian ginseng or winter cherry.