Tropaeolum /trəˈpiːələm, troʊ-/, commonly known as nasturtium (/nəˈstɜːrʃəm, næ-/; literally "nose-twister" or "nose-tweaker"), is a genus of roughly 80 species of annual and perennial herbaceous flowering plants. It was named by Carl Linnaeus and is the only genus in the family Tropaeolaceae. The nasturtiums received their common name because they produce an oil that is similar to that of watercress (Nasturtium officinale).