Equisetum arvense var. riparium Farw. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Equisetales family Equisetaceae genus Equisetum species Equisetum arvense Name Homonyms Equisetum arvense var. riparium Farw. Equisetum arvense f. riparium (Fr.) Asch. Equisetum arvense var. riparium (Fr.) Milde Equisetum arvense subsp. riparium (Fr.) Nyman Equisetum arvense subsp. riparium (Fr.) Rønning