Potamogeton natans ?

Potamogeton natans L., Sp. Pl. 126 1753. (syn: Buccaferrea natans (L.) Bubani; Potamogeton affinis Boenn. ex Cham. & Schlecht.; Potamogeton besseri Steud.; Potamogeton fluitans var. petiolatus (Wolfg.) Nyman; Potamogeton kirkii Syme; Potamogeton morongii A.Benn.; Potamogeton natans f. angustifolius Regel; Potamogeton natans subsp. ellipticus Gaudin; Potamogeton natans var. explanatus Mert. & W.D.J.Koch, nom. superfl.; Potamogeton natans var. intermedius Mert. & W.D.J.Koch, nom. superfl.; Potamogeton natans subsp. kirkii (Syme) Nyman; Potamogeton natans f. lancifolius (Fieber) Rchb.; Potamogeton natans var. lancifolius Fieber; Potamogeton natans var. major W.D.J.Koch & Ziz; Potamogeton natans var. media W.D.J.Koch & Ziz; Potamogeton natans var. minor Hook.f., nom. illeg.; Potamogeton natans f. ovalifolius (Fieber) Rchb.; Potamogeton natans var. ovalifolius Fieber; Potamogeton natans var. petiolaris Nyman; Potamogeton natans subsp. petiolatus (Wolfg.) K.Richt.; Potamogeton natans var. petiolatus (Wolfg.) Nyman; Potamogeton natans var. pygmaeus Gaudin; Potamogeton natans var. terrestris Gray; Potamogeton natans subsp. vulgaris Gaudin; Potamogeton natans f. vulgaris Rchb., nom. illeg.; Potamogeton natans var. vulgaris Roth, not validly publ.; Potamogeton paludosus Bory ex Cham. & Schltdl.; Potamogeton petiolaris C.Presl, nom. illeg.; Potamogeton petiolatus Wolfg.; Potamogeton plantago T.Bastard; Potamogeton samariformis Hagstr.; Potamogeton sparganiifolius Bab., nom. illeg.; Potamogeton uliginosus Boenn. ex Cham. & Schlecht.; Spirillus natans (L.) Nieuwl.) ?;

Temp. & Subtropical Northern Hemisphere: Afghanistan, Alaska, Albania, Alberta, Algeria, Altay, Amur, Austria, Baltic States, Belarus, Belgium, Bulgaria, Buryatiya, Central European Rus, Chita, Colorado, Corse, Czechoslovakia, Denmark, East Aegean Is., East European Russia, Finland, France, Føroyar, Germany, Great Britain, Greece, Hungary, Iceland, Illinois, Iran, Ireland, Irkutsk, Italy, Japan, Kamchatka, Kazakhstan, Kirgizstan, Korea, Krasnoyarsk, Krym, Kuril Is., Lebanon-Syria, Libya, Magadan, Mexico Central, Mexico Northwest, Mexico Southwest, Mongolia, Morocco, Myanmar, Nepal, Netherlands, New Mexico, New York, North Caucasus, North European Russi, Northwest European R, Norway, Pakistan, Poland, Portugal, Primorye, Romania, Sakhalin, Sardegna, Sicilia, South European Russi, Spain, Sweden, Switzerland, Tadzhikistan, Transcaucasus, Tunisia, Turkey, Tuva, Ukraine, Uzbekistan, Vermont, West Himalaya, West Siberia, Yakutskiya, Yemen, Yugoslavia, Yukon as per POWO;