Nitella flexilis f. elongata Allen, 1880 Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Charophyta class Charophyceae order Charales family Characeae genus Nitella species Nitella flexilis Name Homonyms Nitella flexilis f. elongata Wahlst., 1862 Nitella flexilis f. elongata Allen, 1880