Leptodictyum riparium, commonly known as knapwort, is a species of moss commonly found growing in the lakes and rivers of Minnesota and also Mexico, Guatemala, the Bahamas archipelago, Cuba, Jamaica, Haiti, Dominican Republic, Venezuela, Peru and Brazil. However, the only places it is not found are the Pacific Islands and Australia. This moss has several different forms and can grow up to 30 cm and its ovate leaves which are in two rows are often pointed...