Ceratophyllum (Hornwort) is a genus of plants in the family Ceratophyllaceae. They are native to Alaska, U.S. Virgin Islands, Puerto Rico, North America, The Contiguous United States, and Canada.
Definition: A wetland, featuring grasses, rushes, reeds, typhas, sedges, and other herbaceous plants (possibly with low-growing woody plants) in a context of shallow water.