Great awn sedge

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Great awn sedge
Carexatherodes.jpg

Great awn sedge ( Carex atherodes )

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Sedges ( Carex )
Type : Great awn sedge
Scientific name
Carex atherodes
Blast

The great awn sedge ( Carex atherodes ) is a species of the genus Seggen ( Carex ) within the sourgrass family (Cyperaceae). It is widespread in the northern hemisphere in Eurasia and North America .

description

Illustration from Budd's flora of the Canadian Prairie Provinces

Vegetative characteristics

The great awn sedge is a perennial herbaceous plant and reaches stature heights of 60 to 90, rarely up to 120 centimeters. It grows loose grass with runners . The upright stems are bluntly triangular and thickened at the base.

The lowest leaf sheaths are black-brown and very fibrous. The leaves are up to 7 millimeters wide, flat and hairy on the underside, with rough edges.

Generative characteristics

The flowering period extends from May to June. The great awn sedge is a variegated sedge. There are two to four male spikelets . The three to four female spikelets are up to 7 centimeters long, densely flowered and are approached to each other. The lowest spikelet is petiolate. The lower bracts have a short, hairy sheath up to 1 centimeter long and they are longer than the stem. The bracts are pale green and ovate, the tip is long and serrate. The stylus ends in three pits .

The brownish-green, unevenly hairy, often balding fruit when ripe is ovoid to conical and lengthways veined with a length of 7 millimeters. It has long, outwardly curved, rough beak teeth.

The number of chromosomes is 2n = 74.

Occurrence

Carex atherodes is circumpolar and is a submeridional to boreal, continental flora element . Their range includes the subarctic and temperate zones of the northern hemisphere. The great awn sedge is rare in Central Europe .

In Germany it can only be found in forest swamps and sinkholes in Brandenburg's autochthonous occurrence. In addition, an isolated occurrence was found in the Heuckenlock NSG in Hamburg. It reaches the westernmost point of its area near Rathenow in Brandenburg ; here it is very rare; it occurs occasionally in the Oder catchment area . It is likely to be endangered at its borderline locations.

For example, it grows in bogs . The Great Awn-Sedge thrives best on waterlogged, moderately alkaline meadows , longer periods of dry air and warming in summer. It can withstand snow cover for a very long time in spring. But it does not tolerate fertilization and other cultivation measures. It thrives in companies of the Magnocaricion Association.

Taxonomy

The first description of Carex atherodes was made in 1826 by Kurt Sprengel . Synonyms for Carex atherodes Spreng. are: Carex aristata Siegert ex Wimm. nom. illeg., Carex aristata R.Br. nom. illeg., Carex orthostachys C.A.Mey. , Carex orthostachys Rupr. nom. illeg., Carex fuscifructus C.B.Clarke , Carex MIRATA Dewey , Carex siegertiana R.Uechtr. , Carex glaberrima Meinsh. , Carex pergrandis V.I.Krecz. & Luchnik , Carex amurensis var. Mandschurica Kük. , Carex hirta subsp. siegertiana (R.Uechtr.) Nyman , Carex trichocarpa var. imberbis A. Gray , Carex trichocarpa var. aristata L.H.Bailey , Carex trichocarpa var. deweyi L.H.Bailey , Carex trichocarpa var. laeviconica Hitchc. , Carex trichocarpa var. Maxima Kük. , Carex trichocarpa var. Orthostachys (CAMey.) Kük. , Carex trichocarpa var. Turbinata Dewey .

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 (area).
  • Siegmund Seybold (Ed.): Schmeil-Fitschen interactive . CD-ROM, version 1.1. Quelle & Meyer, Wiebelsheim 2002, ISBN 3-494-01327-6 .

Individual evidence

  1. ^ Carex atherodes at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
  2. ↑ a b Rafaël Govaerts (Ed.): Carex atherodes. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 15, 2016.
  3. ↑ Hans-Helmut Poppendieck u. a. (Ed.): The Hamburg Plant Atlas from A to Z. 2nd expanded edition. Dölling and Galitz, Munich / Hamburg 2011, ISBN 978-3-86218-010-3 , p. 190.
  4. ↑ a b Dietmar Aichele, Heinz-Werner Schwegler: The flowering plants of Central Europe . 2nd Edition. tape 5 : Swan flowers to duckweed plants . Franckh-Kosmos, Stuttgart 2000, ISBN 3-440-08048-X , p. 310 .
  5. ^ 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.  193 .
  6. ^ Carex atherodes at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed October 3, 2016.

further reading

  • S. Sohr, Michael Ristow: New locations of Carex atherodes Spreng. in Brandenburg. In: Negotiations of the Botanical Association of Berlin and Brandenburg. Volume 129, 1996, pp. 49-62.
  • S. Sohr: Excursion report Feldsölle and smaller boiler bogs in the vicinity of Groß Behnitz on August 25, 1996. (New locations of Carex atherodes). In: Negotiations of the Botanical Association of Berlin and Brandenburg. Volume 129, 1996, pp. 293-295.

Web links

Commons : Awn-Sedge ( Carex atherodes )  - Collection of images, videos and audio files