Potamogeton crispus var. serrulatus Schrad. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Potamogetonaceae genus Potamogeton species Potamogeton crispus Name Homonyms Potamogeton crispus var. serrulatus Schrad. ex Rchb. Potamogeton crispus var. serrulatus Schrad. Potamogeton crispus f. serrulatus (Opiz) Schrad. ex Rchb. Potamogeton crispus f. serrulatus (Opiz) Schrad.