Houstonia pygnaea C.H.Mull. & M.T.Müll. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Rubiaceae genus Houstonia species Houstonia rosea Name Homonyms Houstonia pygnaea C.H.Mull. & M.T.Müll.