Comb pondweed

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Comb pondweed
Comb pondweed (Stuckenia pectinata)

Comb pondweed ( Stuckenia pectinata )

Systematics
Class : Bedecktsamer (Magnoliopsida)
Monocots
Order : Frog-spoon-like (Alismatales)
Family : Pondweed family (Potamogetonaceae)
Genre : Stuckenia
Type : Comb pondweed
Scientific name
Stuckenia pectinata
( L. ) Borner

The comb pondweed ( Stuckenia pectinata ), also called comb-shaped pondweed, is a species of the family of the pondweed plants (Potamogetonaceae). This constantly submerged living aquatic plant is a typical inhabitants of many lakes and slow-flowing waters.

description

Richly branched single shoot part of the nominate form Potamogeton pectinatus var. Pectinatus

The crested pondweed is a variable and diverse, mostly deciduous plant that can be up to 3 meters long. Its rhizome is only about 2 millimeters thick and can develop pea-sized tubers. The stem is branched like a broom. The narrow, flaccid, thread- or hair-shaped to narrowly linear leaves are one to five-nerved, whereby the lateral nerves are inconspicuous and the transverse nerves are clearly developed. The leaves are usually no wider than 3 millimeters. The leaf sheaths are united with the leaf base, which is a special feature within the plant genus of spawning herbs .

The flowering period extends from May to September. The individual flowers are united in a spike-like inflorescence , which is about 2 to 5 cm long, is first dense and can then be interrupted later. The stem can be between 2 and 10 cm long. The approximately 3 by 3 millimeter small fruits are indistinctly keeled and have a short beak.

The number of chromosomes is 2n = 78, rarely 84.

ecology

Vegetative propagation can also take place through the formation of root tubers or underground runners . The flowers are pollinated by the wind or by the water. The floating fruits spread almost exclusively through the water. It is not uncommon for the fruits to stick to the plumage of birds, for example , and in this way are carried to other places.

Occurrence

The crested pondweed is widespread in all Antarctic or Australian to boreal climatic zones of the northern and southern hemisphere of the earth, it is a cosmopolitan, so its occurrence is not limited to Germany and Europe. In the Alps it can be found at altitudes of up to 1600 meters. The crested pondweed is a characteristic of the plant order Potamogetonetalia pectinati. It can be found in both oligo and eutrophic slow-flowing or stagnant waters. It was not infrequently found in heavily polluted waters. Since it is somewhat salt-tolerant, it can also occur in quiet bays along the coast. It usually grows on humus soils and requires water depths of 20 to 350 centimeters.

Systematics

The first publication took place in 1753 under the name ( Basionym ) Potamogeton pectinatus by Carl von Linné . The new combination to Stuckenia pectinata (L.) Börner was published in 1912 by Carl Julius Bernhard Börner . Börner honored the German high school teacher and botanist in Bremen, Wilhelm Adolf Stucken (1860–1901). Other synonyms for Stuckenia pectinata (L.) Börner are: Coleogeton pectinatus (L.) Les & RRHaynes , Potamogeton balatonicus (Gams) Soó , Potamogeton balatonicus Gams , Potamogeton helveticus (G.Fisch.) W.Koch , Potamogeton interruptus Kit. , Potamogeton marinus L. , Potamogeton zosteraceus Fr. , Stuckenia chakassiensis (Kaschina) Klinkova , Stuckenia marina (L.) Tzvelev , Stuckenia mongolica (A.Benn.) Klinkova , Stuckenia zosteracea (Fr.) Tzvelev , Potamogeton pectinatus subsp. balatonicus (chamois) Soó , Potamogeton pectinatus subsp. chakassinensis Kaschina , Potamogeton vaginatus subsp. helveticus (G. Fisch.) Schinz & Thell. , Potamogeton vaginatus var. Helveticus G. Fisch.

This article or the following section is not adequately provided with supporting documents ( e.g. individual evidence ). Information without sufficient evidence could be removed soon. Please help Wikipedia by researching the information and including good evidence.

In Central Europe, some authors differentiate between varieties or subspecies :

  • Stuckenia pectinata (L.) Börner var. Pectinata with very narrow, maximum 1 mm wide, single-veined, pointed leaves
  • Stuckenia pectinata var. Zosteracea (Fr.) (Syn .: Potamogeton pectinatus var. Zosteraceus (Fr.) Casp. , Stuckenia zosteracea (Fr.) Tzvelev ) with broader, three- to five-nerved leaves that have a rounded tip.

The clan Stuckenia helvetica (G.Fisch.) Holub (Syn .: Potamogeton helveticus (G.Fisch.) W.Koch ) could be a hybrid between the crested pondweed and the filiform pondweed ( Stuckenia filiformis (Pers.) Börner ) . The number of chromosomes is 2n = 26.

supporting documents

  • Henning Haeupler , Thomas Muer: picture atlas of the fern and flowering plants of Germany (= the fern and flowering plants of Germany. Volume 2). Published by the Federal Agency for Nature Conservation. Ulmer, Stuttgart 2000, ISBN 3-8001-3364-4 , p. 575.
  • Erich Oberdorfer : Plant-sociological excursion flora . 7th edition. Ulmer, Stuttgart 1994, ISBN 3-8252-1828-7 , pp. 102-103 .

Individual evidence

  1. ↑ Stuckenia pectinata at Tropicos.org. Missouri Botanical Garden, St. Louis
  2. ↑ Rafaël Govaerts (ed.): Stuckeniia pectinata. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Accessed June 1, 2020.
  3. ↑ Lotte Burkhardt: Directory of eponymous plant names . Botanic Garden and Botanical Museum Berlin, Free University Berlin Berlin 2016. ISBN 978-3-946292-10-4 , page 976. doi : 10.3372 / epolist2016
  4. ↑ P. Uotila, 2009: Potamogetonaceae. : Datasheet In: Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity .

Web links

Commons : Crested pondweed ( Stuckenia pectinata )  - album with pictures, videos and audio files