Polemonium humile subsp. macranthum Cham. Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Ericales family Polemoniaceae genus Polemonium species Polemonium boreale Name Homonyms Polemonium humile subsp. macranthum (Cham.) Wherry Polemonium humile var. macranthum Cham. Polemonium humile subsp. macranthum Cham.