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