Riccia frostii f. major Papp, Mihai & Viţalaru Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Marchantiophyta class Marchantiopsida order Marchantiales family Ricciaceae genus Riccia species Riccia frostii Name Homonyms Riccia frostii var. major Underw. Riccia frostii f. major Papp, Mihai & Viţalaru Riccia frostii var. major Schiffn.