Viola canadensis var. rydbergii (Greene) House ex Rydb. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Malpighiales family Violaceae genus Viola species Viola canadensis Name Homonyms Viola canadensis subsp. rydbergii (Greene) House Viola canadensis var. rydbergii (Greene) House Viola canadensis subsp. rydbergii (Greene) House ex Rydb. Viola canadensis var. rydbergii (Greene) House ex Rydb.