Phyteuma nigrum var. caeruleum Rich.Schulz Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Campanulaceae genus Phyteuma species Phyteuma nigrum Name Homonyms Phyteuma nigrum var. caeruleum Boreau Phyteuma nigrum var. caeruleum Rich.Schulz