Riccia frostii var. major Underw. Dataset GBIF Backbone Taxonomy Rank VARIETY 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.