Specular pondweed

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Specular pondweed
Specular pondweed (Potamogeton lucens) near Pasewalk (Western Pomerania)

Specular pondweed ( Potamogeton lucens ) near Pasewalk (Western Pomerania)

Systematics
Class : Bedecktsamer (Magnoliopsida)
Monocots
Order : Frog-spoon-like (Alismatales)
Family : Pondweed family (Potamogetonaceae)
Genre : Spawn herbs ( Potamogeton )
Type : Specular pondweed
Scientific name
Potamogeton lucens
L.

The mirrored pondweed ( Potamogeton lucens ), also called glossy pondweed , is a species of the genus pondweed ( Potamogeton ) within the family of the pondweed plants (Potamogetonaceae).

description

Illustration from Flora Batava , Volume 11
Habit and leaves
inflorescence
The middle nerve of the leaf ends in a horn or beak (several mm long).

Vegetative characteristics

The specular pondweed is a perennial herbaceous plant with a branched underground rhizome .

The ever submerged permanent, alternate s leaves are divided into petiole and leaf blade. The short petiole is winged. The simple leaf blade is elongated-ovoid and pointed (linear) with a length of up to 30 centimeters and a width of up to 4.5 centimeters. The main leaf veins are curved from the leaf base to the tip, the transverse veins, on the other hand, are very delicate. The leaf blade is slightly transparent and its surface is glossy. The leaf margins are finely serrated and rough. The relatively small stipules are transformed into narrow membranes, the base of which includes the stems.

Generative characteristics

The all-round, spiked inflorescence protrudes from the water during flowering. The hermaphroditic flowers consist of four stamens and four carpels , the flowers have no petals . To protect the reproductive organs, however, the development of the connectives anthers yellow greenish appendage resembling a four-leaf flower corolla.

The solitary fruits are blunt-keeled nuts and form a cluster fruit.

The basic chromosome number is x = 13; there is tetraploidy , i.e. a chromosome number of 2n = 52.

ecology

The specular pondweed is a floating or submerged aquatic plant .

The pollination is carried by the wind.

Occurrence

The distribution area ranges from the temperate areas of the northern hemisphere to the Philippines.

The glossy pondweed thrives in the tropical zone of East Asia and from the meridional to the boreal zone of Europe and West Asia . It grows in nutrient-rich, stagnant or slow-flowing waters at depths of 1.5 to 3.0 meters. In the Allgäu Alps, it rises at Freibergsee near Oberstdorf to an altitude of 928 meters.

The glossy pondweed is a character species of Potamogetonetum lucentis from the Potamogetonion association .

Taxonomy

The first publication of Potamogeton lucens was in 1753 by Carl von Linné in Species Plantarum .

swell

literature

  • Rudolf Schubert , Klaus Werner, Hermann Meusel (eds.): Excursion flora for the areas of the GDR and the FRG . Founded by Werner Rothmaler. 13th edition. tape 2 : vascular plants . People and knowledge, Berlin 1987, ISBN 3-06-012539-2 .
  • Rudolf Schubert , Eckehart J. Jäger, Klaus Werner (Ed.): Excursion flora for the areas of the GDR and the FRG. Founded by Werner Rothmaler. 6th edition. Volume 3: Atlas of vascular plants, people and knowledge, Berlin 1987, ISBN 3-06-012536-8 .
  • Jindřich Krejča: From our nature: plants, rocks, minerals, fossils. (translated from Slovak by Irmtraud Kasperl, Oskar Kasperl). German Agricultural Publishing House, Berlin 1978.
  • Fritz Encke, Günther Buchheim, Siegmund Seybold: Concise dictionary of plant names. Founded by Robert Zander . 12th edition. German Agricultural Publishing House, Berlin 1980.

Individual evidence

  1. ↑ a b c d Specular pondweed . In: BiolFlor, the database of biological-ecological characteristics of the flora of Germany.
  2. ↑ Urania Plant Kingdom , Higher Plants, Volume 2 . Urania, Leipzig / Jena / Berlin 1976, p. 336 .
  3. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . With the collaboration of Angelika Schwabe and Theo Müller. 8th, heavily revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 2001, ISBN 3-8001-3131-5 , pp. 105 .
  4. ↑ Rafaël Govaerts (ed.): Potamogeton lucens. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved August 16, 2016.
  5. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 1, IHW-Verlag, Eching near Munich, 2001, ISBN 3-930167-50-6 , p. 131.
  6. ↑ Carl von Linné: Species Plantarum. Volume 1, Lars Salvius, Stockholm 1753, p. 126 ( digitized versionhttp: //vorlage_digitalisat.test/1%3Dhttp%3A%2F%2Fwww.biodiversitylibrary.org%2Fopenurl%3Fpid%3Dtitle%3A669%26volume%3D1%26issue%3D%26spage%3D126%26date%3D1753~GB%3D~ IA% 3D ~ MDZ% 3D% 0A ~ SZ% 3D ~ double-sided% 3D ~ LT% 3D ~ PUR% 3D ).

Web links

Commons : Spiegelndes Laichkraut ( Potamogeton lucens )  - Album with pictures, videos and audio files