Spirodela oligorrhiza subsp. pusilla Hegelm. Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Araceae genus Spirodela species Spirodela punctata Name Homonyms Spirodela oligorrhiza var. pusilla Hegelm. Spirodela oligorrhiza subsp. pusilla Hegelm.