Helianthus curtissii Fernald ex E.Watson Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Helianthus species Helianthus agrestis Name Homonyms Helianthus curtissii Fernald ex E.Watson Helianthus curtissii Fernald