Schlenken sedge

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Schlenken sedge
Schlenken sedge (Carex heleonastes) in the illustration on the left (1); Carex canescens is shown on the right (2)

Schlenken sedge ( Carex heleonastes ) in the illustration on the left (1); Carex canescens is shown on the right (2)
Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Sedges ( Carex )
Type : Schlenken sedge
Scientific name
Carex heleonastes
L. f.

The Schlenken sedge ( Carex heleonastes ), also called peat sedge , is a species of the genus Seggen ( Carex ) within the family of the sour grass family (Cyperaceae). It is common in the northern hemisphere .

Description and phenology

The Schlenken sedge is a perennial herbaceous plant that reaches heights of 10 to 30 centimeters. It has no runners . It usually forms small, loose clumps . The straight stem is sharp, triangular and very rough below the inflorescence. The leaves are equipped with stomata on both sides, 2 to 2.5 mm wide and gray-green.

The flowering period extends mainly from May to June. The inflorescence, which is usually quite capricious, is up to 2 inches long and contains about four to six spikelets. The spikelets are about 5 to 10 mm long and up to 5 mm wide and brown, the lowest are sometimes a little apart. The tubes are yellow-green and 2.5 to 3 mm long. There are two scars. The fruits ripen quickly, so that by July most of the fruits have already failed.

The species chromosome number is 2n = 56.

Occurrence

The distribution area of the rare Schlenken sedge extends from the Alps to the Alpine foothills , the Carpathians , Bulgaria and the Caucasus ; in Northern Europe, its area extends from the north German plains eastward over the Baltic States and Northern Russia to the Urals ; isolated occurrences exist in western Siberia and it occurs in Iceland . In North America there are occurrences in Canada from Hudson Bay to the Rocky Mountains .

It is rare in the Alpine foothills of Central Europe; occasionally they are found in alpine moors; it forms smaller stocks at its locations. In the Allgäu Alps, it rises in Vorarlberg in Hochtannberg up to 1660 m above sea level.

The Schlenken sedge is an ice age relic . She only finds living conditions that appeal to her in a few protected moor areas. In the Central European lowlands it has largely disappeared due to cultivation measures, although a number of sites were still known there in the last century.

The Schlenken-Sedge thrives best on peat soils that are poor in base or with a moderate base content . It reacts sensitively to increased nitrogen content in the soil. It only thrives in gullies of intermediate moors . It is a character species of the Caricetum heleonastae from the association of the Caricion lasiocarpae.

literature

  • Henning Haeupler, Thomas Muer: picture atlas of the fern and flowering plants of Germany . Published by the Federal Agency for Nature Conservation (=  The fern and flowering plants of Germany . Volume 2 ). 2nd corrected and enlarged edition. Eugen Ulmer, Stuttgart (Hohenheim) 2007, ISBN 978-3-8001-4990-2 .
  • Oskar Sebald, Siegmund Seybold, Georg Philippi, Arno Wörz (eds.): The fern and flowering plants of Baden-Württemberg . tape 8 : Special part (Spermatophyta, subclasses Commelinidae part 2, Arecidae, Liliidae part 2): Juncaceae to Orchidaceae . Eugen Ulmer, Stuttgart (Hohenheim) 1998, ISBN 3-8001-3359-8 .
  • 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. 262 .

Individual evidence

  1. ↑ Schlenken 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 , pp. 175 .
  3. ↑ Erhard Dörr , Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 1, IHW, Eching near Munich 2001, ISBN 3-930167-50-6 .

Web links

Commons : Schlenken sedge ( Carex heleonastes )  - Collection of images, videos and audio files