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Species: Potamogeton nodosus Poir. Date: 2006-09-24 Location: Small dam in forest off the Woodland Rd, Vumba Habitat: In the water; spikes emergent
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Soldaterskov ved Tønder, Danmark
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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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Potamogeton heterophylius. 12, typical habit of land form; 13, terminal portion of rootstock showing tendency to become tuberous; 14, same, more advanced stage; 15, aquarium specimen
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Leafy pondweed (Potamogeton foliosus). Niagra Falls to Michigan and California (After Britton & Brown)
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2011-07-10 Lower Austria, district Bruck/Leitha - Reisenbach (165 msm Quadrant 7965/4).German name: Knoten-LaichkrautThere might be 2 Potamogeton-species in this shot here; those with 'netlike' nerves on the leaves definitely are P. fluitans; I think the other ones too are but they could be from another Potamogeton species growing in the same place.
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2011-07-19 Vienna XXII. district - Danube National Park (Lobau, 150 msm Quadrant 7865/3).German name: Glanz-Laichkraut
See remarks here.
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Drenthe, Netherlands
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2011-07-20 Vienna X. district - Liesing river (170 msm Quadrant 7864/4).German name: Kraus-LaichkrautCommon.
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Hb. FH 2011/63 - Herbarium Falkner Hermann (2011/No 63) (DIN A4)leg.: Falkner Hermann, 2011-07-12: Wien XXII., Untere Lobau - Donau-Oder-Kanal, Ostufer im sdlichen Abschnitt (zur Orientierung: knapp sdlich eines aufflligen Vorkommens von rosafarbenen Nymphaea-Hybriden), im Flachwasserbereich ca. 30 cm bis 1 m (2011 keine blhenden Exemplare aufgefunden): 150 msm Quadrant 7865/1det.: Falkner Hermann, nach Fischer & al., Exkursionsflora A/FL/SdT (2008 3. A.): nach mehrmaligem Besuch des Standorts und mehrfachen Bestimmungsversuchen bin ich zum Schluss gekommen, dass es sich nur um diese Art handeln kann, obwohl sie als sehr selten gilt und in der Exkursionsflora von Fischer nicht (!) angegeben ist (mglicherweise angesalbt, oder doch natrliches Vorkommen bzw. durch Wasservgel eingeschleppt?)Dt: Farb-Laichkraut; English (genus): PondweedSynonyme: Gefrbtes LaichkrautSchenkung an Herbarum WU - donated to Herbarium WU (Universitt Wien, Institut fr Botanik, Wien III., Rennweg) 2012-01-11.
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2010.07.23 N Gnserndorf (bayou, 150 m AMSL).Flowering from may till september; here with Nuphar lutea.Not uncommon.German name: Schwimm-LaichkrautID: Fischer & al., Exkursionsflora (2008 3rd)
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Drenthe, Netherlands
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Juniper Island, Ontario, Canada
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2011-07-20 Vienna X. district - Liesing river (170 msm Quadrant 7864/4).
See remarks here.
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A pondweed widespread in temperate parts of the world, including here in Patagonia.
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Drenthe, Netherlands
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Drenthe, Netherlands
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Drenthe, Netherlands
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Species: Potamogeton nodosus Poir. Date: 2006-09-24 Location: Small dam in forest off the Woodland Rd, Vumba Habitat: In the water; spikes emergent
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Soldaterskov ved Tønder, Danmark
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Potamogeton americanus. 1, seed; 2, seedling 5 days old; 3, seedling 14 days old; 4, seedling of four months; A, winter buds; 5, germinating winter bud, natural size; the last two winter buds belated in development. Aquarium specimen, January 24, 1914
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Potamogeton obtusifolius, erect axes bearing winter buds. October.