Beak sedge

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Beak sedge
Beaked sedge (Carex rostrata)

Beaked sedge ( Carex rostrata )

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Sedges ( Carex )
Type : Beak sedge
Scientific name
Carex rostrata
Stokes

The beak-sedge ( Carex rostrata ) is a species of the genus Seggen ( Carex ) within the sour grass family (Cyperaceae). It is widespread in the northern hemisphere .

description

illustration

The beak sedge is a hibernating green, perennial herbaceous plant that reaches heights of 25 to 80, sometimes 100 centimeters. It forms clumps . The stalks are bluntly triangular at the top, but almost round at the bottom. The narrow, simply folded, gray-green leaves are only 3 or 4 mm wide and have a triangular tip. The red-brown sheaths are not clearly fibrous. The bare leaf blades have characteristic stomata ( stomata ) on the upper side of the leaf (epistomatic), so this appears slightly shiny.

The flowering period extends from June to July. The bracts of the female spikelets are short sheathed. The female spikelets sit two to five in the upper half of the stem. They have a short stalk, are four times as long as they are wide and are topped by one to four male ears. The egg-shaped, inflated, suddenly narrowed into the beak, also yellow-green colored tubes at maturity stand out almost horizontally and are much longer than the blunt, red-brown husks . They are bald and 4 to 6 mm long and have two splaying beak teeth. They always enclose three scars .

The chromosome number of the species is 2n = 72-74, 76 or approx. 60.

  • inflorescence

  • Fruit cluster

  • Nuts

ecology

The beak sedge is a helomorphic hydrophyte and hemicryptophyte . The vegetative reproduction takes place via long runners ( rhizomes ).

The pollination is carried by the wind ( anemophily ). The floating diaspores are spread out by the water ( hydrochory ).

Occurrence

The beaked sedge is common from Europe to the western Himalayas and from subarctic North America to the northern United States. It occurs in almost all of Germany. However, it is less common in the Central German Plain.

It is a common sedge species found in wetlands . It usually grows on the edges of oligo- to mesotrophic lakes , where it often forms large sedge beds with few species . It can also be found in reed beds , in moors , swamp forests and on slow-flowing streams. In Central Europe it occurs primarily in societies of the Caricion-lasiocarpae association, but also in those of the Scheuchzerio-Caricetea class, the Magnocaricion class and in those of the Phragmitetea class.

In the Allgäu Alps, it rises at the Hochalpsee on the Widderstein in the Kleiner Walsertal up to 1960 m above sea level.

Systematics

One can differentiate between the following varieties:

  • Carex rostrata var. Ambigens Fernald : It occurs in eastern Canada.
  • Carex rostrata var. Rostrata : It occurs from Europe to the western Himalayas and from subarctic North America to the northern United States.

Common names

The name Sacher is also used as a common name for Carinthia .

literature

  • Henning Haeupler, Thomas Muer: picture atlas of the fern and flowering plants of Germany . Ed .: Federal Agency for Nature Conservation (=  The fern and flowering plants of Germany . Volume 2 ). Eugen Ulmer, Stuttgart (Hohenheim) 2000, ISBN 3-8001-3364-4 .

Individual evidence

  1. ↑ a b c beak-sedge. In: FloraWeb.de.
  2. ↑ 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 .
  3. ↑ a b c d Rafaël Govaerts (Ed.): Carex rostrata. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 24, 2016.
  4. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 1, IHW, Eching 2001, ISBN 3-930167-50-6 , p. 281.
  5. ^ Georg August Pritzel , Carl Jessen : The German folk names of plants. New contribution to the German linguistic treasure. Philipp Cohen, Hannover 1882, p. 82 ( online ).

Web links

Commons : Beaked Sedge ( Carex rostrata )  - Album with pictures, videos and audio files