Isoetes flaccida Shuttlew. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Lycopodiopsida order Isoetales family Isoetaceae genus Isoetes species Isoetes flaccida Name Homonyms Isoetes flaccida Shuttlew. ex A.Braun Isoetes flaccida Shuttlew.