Ascophyllum mackayi f. robertsonii Batters, 1892 Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Chromista phylum Ochrophyta class Phaeophyceae order Fucales family Fucaceae genus Ascophyllum species Ascophyllum nodosum Name Homonyms Ascophyllum mackayi f. robertsonii Batters, 1892