Oldenlandia diffusa subsp. extensa Hook.f. Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Rubiaceae genus Scleromitrion species Scleromitrion diffusum Name Homonyms Oldenlandia diffusa var. extensa Hook.f. Oldenlandia diffusa subsp. extensa Hook.f.