Potamogeton friesii Rupr. [ Potamogeton mucronatus Schrader ex Sonder]
      
no HD illustration available (m3)
5 832282 Potamogeton friesii Rupr. Potamogetonaceae
J.E. Smith, Engl. Bot., ed. 3, vol. 9 : t. 1418 (1869)