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Solanum is a large and diverse genus of flowering plants, including two food crops of the highest economic importance, the potato and the tomato. It also contains the nightshades and horsenettles, as well as numerous plants cultivated for their ornamental flowers and fruit. Solanum species show a wide range of growing habits, such as annual and perennials, vines, subshrubs, shrubs, and small trees. Many formerly independent genera like Lycopersicon and Cyphomandra are now included in Solanum as subgenera or sections. Thus, the genus today contains roughly 1,500-2,000 species. (via Freebase)