Polygala asbestina subsp. rigens (Burch.) Harv. Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Fabales family Polygalaceae genus Polygala species Polygala rigens Name Homonyms Polygala asbestina var. rigens (Burchard) Harv. Polygala asbestina subsp. rigens (Burch.) Harv.