Boechera holboellii var. retrofracta (Graham) Dorn Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Brassicales family Brassicaceae genus Boechera species Boechera retrofracta Name Homonyms Boechera holboellii var. retrofracta (Graham) Dorn Boechera holboellii subsp. retrofracta (Graham)