Blue-green sedge

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Blue-green sedge
Blue-green sedge (Carex flacca)

Blue-green sedge ( Carex flacca )

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Sedges ( Carex )
Type : Blue-green sedge
Scientific name
Carex flacca
Schreb.

The blue-green sedge ( Carex flacca Schreb. , Synonym: Carex glauca Scop. ), Also known as flaccid sedge , blue sedge or, in older works, also sea-green sedge or blue-gray sedge , is a species of varietal sedges within the sourgrass family (Cyperaceae).

Blue-green sedge ( herbarium evidence )
Male ears (above) and female ears (below)
Female ears of wheat
Hoses
Hose with cover sheet

description

The blue-green sedge grows as a perennial herbaceous plant and reaches heights of about 20 to 50, rarely up to 80 centimeters. It has long runners. The upright stalk is smooth, bluntly triangular and only leafed in the lower part. The stem leaves are mostly blue-green on the underside, about 2 to 5 mm wide, stiff and rough on the edge. The basal leaf sheaths are strong and roughly slit.

The blue-green sedge belongs to the variety of sedges in which the spikelets are shaped differently. The upper or the uppermost always contain only male flowers , while the lower or the lower almost always contain only female flowers . The entire inflorescence has a length of about 5 to 15 cm. Usually one inflorescence has one to three male and two to three female spikelets. These stand at a distance, are cylindrical in shape, have long stalks and finally drooping. The husks are pointed and dark red-brown in color. The fruit sacs are ellipsoidal with a length of 3 to 4.5 mm, blunt and often have an outwardly curved tip. They are flattened and arched, dark brown to black in color, bristly eyelashes, nerveless and without a clear beak.

The number of chromosomes is 2n = 76, also 38 or 90.

Blue-green sedge ( Carex flacca )

ecology

The vegetative reproduction takes place through thick, underground creeping runners . The leaves are given their blue-green color by a thicker wax coating.

The flowering period extends mainly from April to June. The utriculi spread out like a rain wash; spread by earthworms has also been observed. The fruits collected in summer do not germinate before 9-10 months. You need a post-maturation period. After that, they remain viable for at least 5 years. The seedlings do not bloom for at least the first two years.

Occurrence

The blue-green sedge is a Eurasian-suboceanic-sub-Mediterranean flora element . Carex flacca occurs throughout Europe, from Asia Minor to Syria, Iran, Pakistan, North Africa and introduced in North and Central America. In Central Europe it is widespread and mostly common. In Austria and Switzerland it is one of the most common types of sedges. In Germany it is widespread in the entire area and is often found in small, loose stands, especially in the limestone areas. It is absent in Central Europe in larger areas of the lowlands, on silicate soils it is absent in smaller areas. In the Alps it rises to altitudes of around 1950 meters. In the Allgäu Alps, it rises at the gable in Bavaria up to 1850 m above sea level.

The blue-green sedge grows on wet meadows , semi- arid grassland , the edge of flat moors, on paths and forest paths and in sparse forests. It occurs frequently in societies of the Molinion or freshly exchanged Mesobromion, further in the Seslerion and Caricion davallianae, but also in the Carici-Fagetum and in societies of the Quercetalia pubescentis. It prefers loamy-clayey, rather deep soil, which should be at least temporarily moist and contain plenty of bases and some lime. It needs summer warmth, but it avoids full shade.

Systematics

One can distinguish between two subspecies:

  • Carex flacca subsp. erythrostachys (Hoppe) Holub : It occurs from the Mediterranean area to Pakistan.
  • Carex flacca subsp. flacca : It occurs in northwest Africa and from Europe to Turkey.

Others

The blue-green sedge tends to have many deformities and different shapes, which in turn are connected to one another by transitions.

Its tough leaves are occasionally used as a substitute for bast to tie up useful bushes.

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 .
  • Wolfgang Adler, Karl Oswald, Raimund Fischer: Excursion flora of Austria . Ed .: Manfred A. Fischer. Eugen Ulmer, Stuttgart / Vienna 1994, ISBN 3-8001-3461-6 .
  • Christian Heitz: School and excursion flora for Switzerland. Taking into account the border areas. Identification book for wild growing vascular plants . Founded by August Binz. 18th completely revised and expanded edition. Schwabe & Co., Basel 1986, ISBN 3-7965-0832-4 .
  • Erich Oberdorfer : Plant-sociological excursion flora . With the collaboration of Theo Müller. 6th, revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 1990, ISBN 3-8001-3454-3 .
  • Konrad von Weihe (ed.): Illustrated flora. Germany and neighboring areas. Vascular cryptogams and flowering plants . Founded by August Garcke. 23rd edition. Paul Parey, Berlin / Hamburg 1972, ISBN 3-489-68034-0 .
  • Ruprecht Düll , Herfried Kutzelnigg : Pocket dictionary of plants in Germany and neighboring countries. The most common Central European species in portrait . 7th, corrected and enlarged edition. Quelle & Meyer, Wiebelsheim 2011, ISBN 978-3-494-01424-1 .
  • 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 .

Individual evidence

  1. ↑ 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. 185-186 .
  2. ↑ a b c d Rafaël Govaerts (Ed.): Carex flacca. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 19, 2016.
  3. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 1, IHW, Eching 2001, ISBN 3-930167-50-6 , p. 260.

Web links

Commons : Blue-green sedge ( Carex flacca )  - album with pictures, videos and audio files