Rhododendron superbum hort. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Ericales family Ericaceae genus Rhododendron species Rhododendron superbum Name Homonyms Rhododendron superbum Sleumer Rhododendron superbum hort. ex Lavallée, 1877 Rhododendron superbum hort.