Riccia tumida var. pearsonii Carrington ex Pearson Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Marchantiophyta class Marchantiopsida order Marchantiales family Ricciaceae genus Riccia species Riccia michelii Name Homonyms Riccia tumida var. pearsonii Carrington Riccia tumida var. pearsonii Carrington ex Pearson