Riccardia jackii f. crassior (Schiffn.) Schiffn. Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Marchantiophyta class Jungermanniopsida order Metzgeriales family Aneuraceae genus Riccardia species Riccardia jackii Name Homonyms Riccardia jackii f. crassior (Schiffn.) Schiffn. Riccardia jackii var. crassior Schiffn.