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Potamogeton filiformis and P. pectinatus (Potamogetonaceae) in Poland. Fragmenta Floristica et Geobotanica Polonica 8: 79–91. Kraków. PL ISSN 1640 629X. ABSTRACT: The genus Potamogeton subgen. Coleogeton is represented by two species in Poland: Potamogeton filiformis Pers. and P. pectinatus L. The aim of this paper is expressing differences between these species in taxonomy, variation and distribution. A detailed list of localities based on data from herbarium materials of these species is also presented.