Eyrie sedge

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Eyrie sedge
Horst sedge (Carex sempervirens)

Horst sedge ( Carex sempervirens )

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Sedges ( Carex )
Type : Eyrie sedge
Scientific name
Carex sempervirens
Vill.

The eyrie sedge ( Carex sempervirens ), also called the evergreen sedge , is a species of the genus of the sedges ( Carex ) within the sour grass family (Cyperaceae). In Europe, it mainly thrives in the Alps .

description

illustration
Male spikelet
Female spikelets

Vegetative characteristics

The eyrie sedge is a wintering green, from which the epithet sempervirens for evergreen is derived, perennial , herbaceous plant that reaches heights of about 20 to 40 centimeters. It has a dense clump-like habit and forms no or only short runners . The erect stems are round and barely longer than the leaves. The leaves are 2 to 3 millimeters wide, stiff, runny, the surface is bare and shiny. The basal sheaths are yellow-brown and weathered to brown-red, fibrous remains.

Generative characteristics

The flowering period extends from May to August. The Horst-Segge belongs to the variety of sedges (Untergenus Carex subgen. Carex ). The bracts have long sheaths, the lowest is usually shorter than its ear. The ovate, pointed bracts are dark brown with a green central stripe and a white skin edge. Each inflorescence contains one male and two to three female spikelets . The male spikelet is 10 to 20 millimeters long and club-shaped. The female spikelets are 15 to 30 millimeters long and rather stocky. The tubes are 4 to 5.5 millimeters in size and three-grained.

The fruits are about 5 millimeters long, sharp triangular and ciliate bristly above and gradually narrow into the beak .

The number of chromosomes is 2n = 30, less often 31, 32 or 34.

ecology

The Horst sedge is a hemicryptophyte .

Occurrence

The Horst-Sedge is a floral element in the submeridional / alpine to sub-temperate / dealpine area of ​​ocean-toned Europe. Its main distribution is in the Alps , otherwise it is rather rare. In Central Europe it occurs only in the foothills of the Alps and in the Swiss Jura , except in individual locations in the southwestern Swabian Alb .

It occurs in mountainous or flat areas and it thrives mainly at altitudes of 1500 to 2500 meters. In the Allgäu Alps, it rises on the Hochrappenkopf in Bavaria to an altitude of 2400 meters.

The Horst sedge grows in subalpine to alpine stone and poor grassland and colonizes rocky slopes and alpine meadows . The Horst sedge thrives best on moderately dry to fresh, base-rich to acidic, often low-lime, loose, stony and humus-rich loam soils .

The main area of ​​distribution is in Blaugrashalden and other societies of the class Seslerietea. It is a characteristic of the blue grass Horstseggen lawn (Seslerio-Caricetum sempervirentis = "Semperviretum") and the silicate Horstseggenhalden (Caricetum sempervirentis). But it also occurs in societies of the Mesobromion, Nardion or Erico-Pinion associations.

At its locations, it is usually an inventory building. It is a pioneer plant on bare rock. Although it is insensitive to grazing , it hardly provides good locations for usable hay .

literature

  • Manfred A. Fischer, Wolfgang Adler, Karl Oswald: Excursion flora for Austria, Liechtenstein and South Tyrol . 2nd, improved and enlarged edition. State of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2005, ISBN 3-85474-140-5 .
  • Erich Oberdorfer : Plant-sociological excursion flora . With the collaboration of Theo Müller. 7th, revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 1994, ISBN 3-8252-1828-7 .
  • 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. ↑ a b c d Carex sempervirens Vill., Horst-Segge. 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.  189 .
  3. ↑ a b c d e 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 .
  4. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings . Volume 1, IHW-Verlag, Eching near Munich, 2001, ISBN 3-930167-50-6 , p. 275.

Web links

Commons : Horst-Segge ( Carex sempervirens )  - Album with pictures, videos and audio files