Late yellow sedge

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Late yellow sedge
Late yellow sedge (Carex viridula)

Late yellow sedge ( Carex viridula )

Systematics
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Sedges ( Carex )
without rank: Yellow sedges (Carex flava agg.)
Type : Late yellow sedge
Scientific name
Carex viridula
Michx.

The late yellow sedge ( Carex viridula ) is a species of the sour grass family (Cyperaceae); it is part of the species complex of yellow sedges ( Carex flava agg.).

description

The late yellow sedge is a perennial herbaceous plant that reaches stature heights of only about 10 to 20 centimeters. It belongs to the clump-forming sedges. The yellow-green to grass-green colored late yellow sedge has a straight stem . The mostly runny leaves are up to 3 millimeters wide.

The sheath of the foliage-like bracts are often extended to 0.5 mm compared to the blade. The late yellow sedge has only one male, mostly sessile, ear , which is up to 10 mm long and towers over the stalked female ear. These are briefly shaped like cylinders and densely packed, of which only the bottom is sometimes slightly pressed. In each spikelet there are bald tubes that can be 2 to 3.5 mm long and include three stigmas. The beak, which is just yellow in color, becomes up to 1 mm long and is no longer than half the remaining part of the tube.

The number of chromosomes is 2n = 68 or 70.

ecology

The late yellow sedge blooms from May to September. The plant is pollinated by the wind ( anemophilia ). The buoyant seeds are spread by the water ( hydrochory ) or by the wind ( anemochory ). However, it also reproduces vegetatively with the help of its rhizome .

Occurrence

The late yellow sedge is common in the subarctic and temperate zones of the northern hemisphere . It occurs all over Germany except for the central German arid regions.

It prefers nutrient-poor, but more alkaline-rich locations and occurs on extensively used wet meadows, on the edges of ditches, damp forests and moors, but also on the banks of bodies of water. It is a salt-bearing pioneer plant that occurs mainly in disturbed societies of the Scheuchzerio-Caricetea class, less often in those of the Littorelletea class or the Agropyro-Rumicion class.

Systematics

According to R. Govaerts, Carex is viridula Michx. as Carex oederi Retz. var. oederi a variety of Carex oederi . According to him, Carex oederi is divided into the following varieties:

  • Carex oederi var. Bergrothii (Palmgr.) Hedrén & Lassen (Syn .: Carex viridula var. Bergrothii (Palmgr.) B. Schmid , Carex bergrothii Palmgr. ): It occurs in northern and northeastern Europe.
  • Carex oederi var. Oederi (Syn .: Carex viridula Michx. , Carex oederi var. Viridula (Michx.) Kük. ): It occurs in the subarctic and temperate zones of the northern hemisphere.
  • Carex oederi var. Pulchella (Lönnr.) Hedrén & Lassen (Syn .: Carex viridula var. Pulchella (Lönnr.) B.Schmid , Carex oederi subsp. Pulchella Lönnr. , Carex serotina subsp. Pulchella (Lönnr.) Ooststr. ): It occurs in the Azores and in western and northern Europe from Great Britain, the Netherlands, Germany, Poland, Sweden to Finland, the Baltic States and northern Russia.

literature

  • Rudolf Schubert, Walter Vent (Ed.): Excursion flora from Germany. Founded by Werner Rothmaler. 8th edition (new edition). Volume 4: Vascular Plants: Critical Volume, Gustav Fischer, Jena 1994, ISBN 3-334-60830-1 .

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.  192 .
  2. ↑ a b c d e Rafaël Govaerts (Ed.): Carex viridula. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 25, 2016.

Web links

Commons : Late Yellow Sedge  - Album containing pictures, videos and audio files