Diodia frankii Steud. & Hochst. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Rubiaceae genus Houstonia species Houstonia purpurea Name Homonyms Diodia frankii Steud. & Hochst. ex C.Presl Diodia frankii Steud. & Hochst.