Ceratophyllum demersum Sieber Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Ceratophyllales family Ceratophyllaceae genus Ceratophyllum species Ceratophyllum demersum Name Homonyms Ceratophyllum demersum L. Ceratophyllum demersum Sieber ex Cham., 1829 Ceratophyllum demersum Sieber