Helianthus angustifolius (L.) Michx. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Helianthus species Helianthus angustifolius Name Homonyms Helianthus angustifolius L. Helianthus angustifolius (L.) Michx. ex DC., 1836 Helianthus angustifolius Spreng. ex Baker Helianthus angustifolius Spreng. Helianthus angustifolius (L.) Michx.