Nauclea polycephala A.Rich. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Rubiaceae genus Uncaria species Uncaria tomentosa Name Homonyms Nauclea polycephala A.Rich. ex DC. Nauclea polycephala Wall. Nauclea polycephala Wall. ex G.Don Nauclea polycephala A.Rich.