Equisetum robustum A.Braun Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Equisetales family Equisetaceae genus Equisetum species Equisetum praealtum Name Homonyms Equisetum robustum A.Braun Equisetum robustum A.Braun ex Engelm. Equisetum robustum Newberry, 1863