File:PotamogetonAcutifolius9.jpg

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English: Fruits of Sharp-leaved Pondweed (Potamogeton acutifolius); length: ~3 mm. (Magnification ratio of the 1:1 macro lens has been doubled by a 2×TC.)
Deutsch: Einzelne Früchtchen einer Fruchtähre des Spitzblättrigen Laichkrautes (Potamogeton acutifolius); Länge: ca. 3 mm. Beachte auch die "Bauchhöcker" – als ein Unterscheidungsmerkmal vom ähnlichen Potamogeton compressus. Die verwendete Fruchtähre bestand aus 8 Früchtchen. (Weitere ausgezählte Ähren enthielten teilweise 7 Früchtchen; die in mancher Bestimmungsliteratur genannte Menge "4 bis 6" ist insofern zu relativieren!)
Die Vergrößerung des 1:1-Makroobjektivs wurde hier durch einen 2×TK verdoppelt. (Die Brennweite lautet also eigentlich 180, nicht 90 mm, wie in den automatischen Exif-Daten steht.)
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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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current14:12, 2 August 2011Thumbnail for version as of 14:12, 2 August 20112,000 × 1,457 (1.95 MB)Fice (talk | contribs){{Information| |Description= '''''English:''''' Fruits of '''Sharp-leaved Pondweed''' (''Potamogeton acutifolius''); length: ~3 mm. '''''Deutsch:''''' Einzelne Früchtchen einer Fruchtähre des '''Spitzblättrigen Laichkrautes''

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