Wire sedge

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Wire sedge
Carex diandra.jpg

Wire sedge ( Carex diandra )

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Sedges ( Carex )
Type : Wire sedge
Scientific name
Carex diandra
closet

The wire sedge ( Carex diandra ) is a species of the genus of the sedge ( Carex ) in the sour grass family (Cyperaceae).

description

Illustration from Flora Batava , Volume 9

The wire sedge grows as a perennial herbaceous plant and reaches heights of 20 to 70 centimeters. It has a creeping, short rhizome. Their upright stems have an almost round cross-section below and a triangular cross-section above. The leaves are narrow, only 2 mm wide and shorter than the stem.

The flowering period is between May and June. The densely packed spike-like inflorescence is 2 to 3 centimeters long with up to 1 centimeter long branches. The egg-shaped spikelets are covered with female flowers at the base. The red-brown to light brown husks are 3 millimeters long and 2 millimeters wide, egg-shaped with a pointed upper end and a lighter keel and a wide white skin margin. The dark brown, very shiny tubes have no nerves and are 2.5 to 3 millimeters long, 1 to 1.5 millimeters wide, arched on both sides and gradually narrowed into a two-toothed beak. The male flowers have three stamens and female flowers two stigmas.

The fruit is light brown.

The number of chromosomes is 2n = 60.

Wire sedge ( Carex diandra ) in Finland

Occurrence

The distribution area of the wire sedge extends from Eurasia to North America and New Zealand . It is mostly absent in southern Europe and the Arctic , but occurs in the Canary Islands . In Germany it is generally rare.

The wire sedge occurs on wet, moderately alkaline and moderately acidic peat mud soils . It populates flat moors , alder quarries and the banks of forest ponds. It is a characteristic of the Caricetum diandrae from the Eriophorion gracilis association. It is a type of lowland and only rises in the Alps to altitudes of 1900 meters. In the Allgäu Alps , it rises to an altitude of 1660 meters on Kalbelesee near the Hochtannbergpass in Vorarlberg.

Taxonomy

The first publication of Carex diandra carried out in 1781 by Franz von Paula Schrank in Acta Academiae Scientiarum Electoralis Moguntinae Utilium quae Erfurti Est. , 57, 49. A homonym is Carex diandra Roth (in Tentamen Florae Germanicae , 2 (2), 1793, p. 437). Synonyms for Carex diandra closet are: Vignea diandra (closet) Soják , Carex paniculata var. Diandra (closet) Fiori , Carex teretiuscula Gooden. The specific epithet diandra , which means "with two stamens", it carries wrongly because it has three stamens; Once a scientific name has been given, it cannot be changed, even if it is incorrect.

literature

  • Wolfram Schultze Motel: Cyperaceae. In: Wolfram Schultze-Motel (Hrsg.): Illustrierte Flora von Mitteleuropa. Pteridophyta, Spermatophyta . Founded by Gustav Hegi. 3rd, completely revised edition. Volume II. Part 1: Angiospermae: Monocotyledones 2 (Cyperaceae - Juncaceae) . Paul Parey, Berlin / Hamburg 1980, ISBN 3-489-54020-4 , pp. 133–134 (published in 1967–1980).
  • Arthur Oliver Chater: Carex. In: TG Tutin, VH Heywood, NA Burges, DM Moore, DH Valentine, SM Walters, DA Webb (eds.): Flora Europaea . Volume 5: Alismataceae to Orchidaceae (Monocotyledones) . Cambridge University Press, Cambridge 1980, ISBN 0-521-20108-X , pp. 297 (English, limited preview in Google Book search).

Individual evidence

  1. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 1, IHW, Eching 2001, ISBN 3-930167-50-6 , p. 249.
  2. ^ Carex diandra at Tropicos.org. Missouri Botanical Garden, St. Louis
  3. ↑ P. Jiménez-Mejías, M. Luceño: Cyperaceae. Carex diandra . In: Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity. Berlin 2011.

Web links

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