Myriophyllum alternifolium DC. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Saxifragales family Haloragaceae genus Myriophyllum species Myriophyllum alterniflorum Name Homonyms Myriophyllum alternifolium DC. ex J.M.Macoun, 1894 Myriophyllum alternifolium DC.