Physarum cinereum Schumach. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Protozoa phylum Mycetozoa class Myxomycetes order Physarales family Physaraceae genus Physarum species Physarum cinereum Name Homonyms Physarum cinereum (Batsch) Pers., 1794 Physarum cinereum Link Physarum cinereum Schumach.