Riccia fluitans f. nodosa (Boucher ex DC.) Underw. Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Marchantiophyta class Marchantiopsida order Marchantiales family Ricciaceae genus Riccia species Riccia canaliculata Name Homonyms Riccia fluitans f. nodosa (Boucher ex DC.) Underw.