Canthium barbatum f. christianii Fosberg Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Rubiaceae genus Cyclophyllum species Cyclophyllum barbatum Name Homonyms Canthium barbatum var. christianii Fosberg Canthium barbatum f. christianii Fosberg