Equisetum arvense var. triquetrum Bory Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Equisetales family Equisetaceae genus Equisetum species Equisetum pratense Name Homonyms Equisetum arvense var. triquetrum Bory ex Vauch. Equisetum arvense var. triquetrum Bory