Equisetum silvaticum var. squarrosum A.A.Eat. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Equisetales family Equisetaceae genus Equisetum species Equisetum sylvaticum Name Homonyms Equisetum silvaticum var. squarrosum A.A.Eaton