Exacum metzianum Hohen. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Gentianaceae genus Exacum species Exacum tetragonum Name Homonyms Exacum metzianum Hohen. ex C.B.Clarke Exacum metzianum Hohen.