Helianthium tenellum (Mart.) Britton Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Alismataceae genus Helanthium species Helanthium tenellum Name Homonyms Helianthium tenellum (Mart. ex Schult.f.) J.G.Sm. Helianthium tenellum (Mart.) Britton