Nauclea canescens Bartl. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Rubiaceae genus Uncaria species Uncaria velutina Name Homonyms Nauclea canescens Bartl. Nauclea canescens (Korth.) Walp. Nauclea canescens Bartl. ex DC.