File:PotamogetonAcutifolius5.jpg

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English: Close-up of a detail of the Sharp-leaved Pondweed (Potamogeton acutifolius). The two "knobs" (middle) are a crucial feature for the distinction from the similar species Potamogeton compressus. (Magnification ratio of the 1:1 macro lens has been doubled by a 2×TC.)
Deutsch: Nahaufnahme der Rückseite des Blattgrundes des Spitzblättrigen Laichkrauts (Potamogeton acutifolius). Man erkennt in der Bildmitte zwei Höcker, die ein wichtiges Unterscheidungsmerkmal zum ähnlichen Flachstängeligen Laichkraut, Potamogeton compressus, darstellen. Rechts davon (rechte Bildhälfte) ist die Breitseite des flachgedrückten Stängels zu sehen. (Die Vergrößerung des 1:1-Makroobjektivs wurde hier durch einen 2×TK verdoppelt.)
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Source Own work. Location: North-eastern Lower Saxony, Germany.
Author Christian Fischer
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Attribution: Christian Fischer
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current14:31, 9 July 2011Thumbnail for version as of 14:31, 9 July 20112,000 × 1,384 (1.66 MB)Fice (talk | contribs){{Information| |Description= '''''English:''''' Close-up of a detail of the pondweed '''''Potamogeton acutifolius'''''. '''''Deutsch:''''' Nahaufnahme der Rückseite des Blattgrundes des '''Spitzblättrigen Laichkrauts''' (''Pot

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