Hypnea horrida (C.Agardh) J.Agardh, 1847 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Rhodophyta class Florideophyceae order Ceramiales family Rhodomelaceae genus Endosiphonia species Endosiphonia horrida Name Homonyms Hypnea horrida (C.Agardh) J.Agardh, 1847