Polysiphonia denudata (Dillwyn) Greville Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Rhodomelaceae genus Polysiphonia species Polysiphonia denudata Name Homonyms Polysiphonia denudata (Dillwyn) Grev. ex Harv. Polysiphonia denudata (Dillwyn) Greville