Helianthus giganteus var. giganteus Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Helianthus species Helianthus giganteus Name Homonyms Helianthus giganteus subsp. giganteus Helianthus giganteus var. giganteus Helianthus giganteus f. giganteus