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Aptera, E of Chania, Greece
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Subbæk Vandmølle ved Viborg, Danmark
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Uggerby Strand, Nordjylland, Danmark
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Nørreå, Fladbro, Randers
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Skjern Å, Søndre parallelkanal, Danmark
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Nors Sø, NV-Jylland, Danmark
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Sverige, Halland, GRrimeton, Skärsjön
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Botaniska trädgården, Göteborg
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Sardinia
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Mariager Fjord nær Mariager, Danmark
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Kolding
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Fil Sø, Vindum Skov, Jylland, Danmark
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Botanisk have Århus
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Nørre Onsild nær Hobro, Jylland, Danmark
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Cirque de Campuls Ariège Pyrénées
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Lendrup S Løgstør, Jylland, Danmark
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Stjärneholms borgruin, Skurup, Skåne
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Stenarmen ved Mariager, Danmark
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Closeup of turtle grass (wide blades) and manatee grass (cylindrical blades)
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Long-beaked arrowhead (Sagittaria longirostra). Found in swamps and along ponds, New Jersey and Pennsylvania to Alabama (After Britton & Brown)
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Potamogeton americanus, spray showing attachment of cases of caddis fly (fam. Leptoceridae).
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Potamogeton obtusifolius, winter buds. October.
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Potamogeton Robbinsii, photo-micrograph of section through old stem, showing arrangement of mechanical tissue.
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Water plantain (Alisma Plantago-aquatica). Found in shallow water or mud throughout North America. Also in Europe and Asia (After Britton & Brown)