? scrobiculatus Schlotheim, 1820 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Equisetales family Calamitaceae Name Homonyms ? scrobiculatus Schlotheim, 1820 ? scrobiculatus Goldufss, 1826 ? scrobiculatus Lightfoot