Polysiphonia elongata var. rosea (Grev.) J.Agardh Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Rhodomelaceae genus Vertebrata species Vertebrata spec Name Homonyms Polysiphonia elongata var. rosea (Grev.) J.Agardh