Colored pondweed

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Colored pondweed
Colored pondweed (Potamogeton coloratus)

Colored pondweed ( Potamogeton coloratus )

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

The colored pondweed ( Potamogeton coloratus ) is a species of the genus of the pondweed herbs ( Potamogeton ) within the family of the pondweed plants (Potamogetonaceae).

description

The colored pondweed is an herbaceous plant . The stem is 0.3 to 1 meter long and not very branched. The submerged leaves are lanceolate, narrowed into a short stem, translucent and reddish. The floating leaves are thin, mostly reddish, spade-shaped, equipped with a fine vein network and have a short stalk.

The flower ear of the colored pondweed is thin, the stem is slender and up to 10, rarely up to 15 centimeters long.

The flowering period is from June to September.

The very small fruits are 1 to 1.5 mm long, blunt and keeled. Often there are more than 100 of them in one ear.

The landforms of the colored pondweed are common and they take root on muddy soil.

The chromosome number of the species is 2n = 26.

Occurrence

The distribution area of ​​the colored pondweed extends from Europe to the Caucasus and includes North Africa and the Caribbean.

The colored pondweed thrives best in unpolluted and clear fresh water in slow-flowing streams and ditches, the lime content of which should be rather high, but it also works in still waters when it is shallow and warm in summer. It thrives in water depths of 20-300 centimeters. It occurs in the company of Potamogetonetum colorati from the association Ranunculion fluitantis.

The colored pondweed has never been abundant in Central Europe, and its population is currently threatened because of the impairment of its potential locations. It is estimated that it lost around 50% of its previously known locations in Central Europe in the 20th century. It is still very rarely found in Germany today in the catchment area of ​​the Upper, Middle and Lower Rhine , the Aller and the central Weser , the Bode , the Lech and the Isar . Occasionally it still occurs in Upper and Lower Austria , in Tyrol and Vorarlberg and in north-western Switzerland .

literature

  • Otto Schmeil , Jost Fitschen (greeting), Siegmund Seybold : The flora of Germany and the neighboring countries. A book for identifying all wild and frequently cultivated vascular plants. 95th completely revised u. exp. Edition. Quelle & Meyer, Wiebelsheim 2011, ISBN 978-3-494-01498-2 .
  • Henning Haeupler , Thomas Muer: picture atlas of the fern and flowering plants of Germany (= the fern and flowering plants of Germany. Volume 2). 2nd, corrected and enlarged edition. Published by the Federal Agency for Nature Conservation. Ulmer, Stuttgart 2007, ISBN 978-3-8001-4990-2 .
  • Dietmar Aichele, Heinz-Werner Schwegler: The flowering plants of Central Europe. Franckh-Kosmos-Verlag, 2nd revised edition 1994, 2000, Volume 5, ISBN 3-440-08048-X .

Individual evidence

  1. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Page 106. Stuttgart, Verlag Eugen Ulmer, 2001. ISBN 3-8001-3131-5
  2. ↑ Rafaël Govaerts (Ed.): Potamogeton coloratus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved August 16, 2016.

Web links