Sargassum myriocystum var. horridula Grunow Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Ochrophyta class Phaeophyceae order Fucales family Sargassaceae genus Sargassum species Sargassum myriocystum Name Homonyms Sargassum myriocystum var. horridula Grunow Sargassum myriocystum f. horridula Grunow Sargassum myriocystum subsp. horridula Grunow