Rhododendron williamsii Merr. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Ericales family Ericaceae genus Rhododendron species Rhododendron williamsii Name Homonyms Rhododendron williamsii Merr. ex H.F.Copel. Rhododendron williamsii Merr. Rhododendron ×williamsii Mottet