Exacum millotii subsp. protractum Humbert Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Gentianaceae genus Exacum species Exacum millotii Name Homonyms Exacum millotii var. protractum Humbert Exacum millotii subsp. protractum Humbert