hornwort References Images hornwort plant, Ceratophyllum genus Ask Anything Homework Help Also known as: Ceratophyllum Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Ceratophyllales…with one cosmopolitan genus (Ceratophyllum) containing 10 species. Read More…with one cosmopolitan genus (Ceratophyllum) containing 10 species. Read More