Oldenlandia subviscosa C.Wright Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Rubiaceae genus Houstonia species Houstonia subviscosa Name Homonyms Oldenlandia subviscosa C.Wright ex A.Gray Oldenlandia subviscosa C.Wright