Oenothera biennis var. sulphurea de Vries Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Myrtales family Onagraceae genus Oenothera species Oenothera biennis Name Homonyms Oenothera biennis var. sulphurea Kleb. Oenothera biennis var. sulphurea de Vries Oenothera biennis var. sulphurea de Vries ex Bartlett