Isoetes tenuissima var. longifolia Legrand Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Lycopodiopsida order Isoetales family Isoetaceae genus Isoetes species Isoetes longissima Name Homonyms Isoetes tenuissima var. longifolia Legrand Isoetes tenuissima var. longifolia Le Grand