Two-line sedge
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Two-row sedge ( Carex disticha ) |
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| Carex disticha | ||||||||||||
| Huds. |
The Carex Disticha ( Carex disticha even comb sedge or Kammsegge ) belongs to the family Cyperaceae (Cyperaceae). The wind causes both the pollination ( anemophilia ) and the seed dispersal ( anemochory ) of this plant species. However, it also reproduces vegetatively with the help of its rhizome and its subterranean runners.
description
The two-row sedge is a deciduous, perennial, herbaceous plant that reaches heights of about 20 to 70 cm. It forms characteristic long runners . The diameter of the rhizomes is only 2 to 3 mm. Both the stem, which is rough at the top, and the leaves are erect. However, when the fruit is ripe, the stem can overhang slightly. The front of the leaf sheath is green-nerved. A green-nerved ligule with a vaginal membrane is therefore present. The leaves are 2 to 4 mm wide.
It forms a 3 to 7 cm long inflorescence , which is occupied with 10 to 25 spikelets. The upper and lower spikelets are mostly purely female and male only in the middle. Therefore, when the fruit is ripe, the ears appear constricted in the middle. However, the distribution of the sexes in the inflorescence can vary. The ripe spikelets are brown in color. The tubes are indistinctly narrow winged, about 5 mm long and 2 mm wide and enclose two scars.
It blooms in May and June.
The number of chromosomes is 2n = 62.
Occurrence
The two-row sedge is widespread in Europe and West Asia up to China. It is also found in North Africa. In East America it was introduced by humans as a neophyte . It occurs relatively frequently throughout Germany. It is only rare in the mountains and in the central German dry area.
The two-row sedge thrives on waterlogged or oozing wet, temporarily flooded, nutrient-rich and base-rich, mostly calcareous, mildly humus clay or clayey sandy soils. It is part of the Großseggenrieden and occurs mainly on the banks of silted-up waters and in extensively used wet meadows. It occurs especially in companies of the Magnocaricion Association.
swell
- 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 .
- E. Foerster: Sedges, rushes, ledges and other mock grasses of grassland - a key to determining in the flowerless state. Manuscript, Kleve-Kellen March 1982.
Individual evidence
- ↑ a b c 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. 174 .
- ↑ a b Rafaël Govaerts (Ed.): Carex disticha. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 14, 2016.
Web links
- Two-line sedge. In: FloraWeb.de.
- Two-line sedge . In: BiolFlor, the database of biological-ecological characteristics of the flora of Germany.
- Profile and distribution map for Bavaria . In: Botanical Information Hub of Bavaria .
- Carex disticha Huds. In: Info Flora , the national data and information center for Swiss flora .
- Distribution in the northern hemisphere from: Eric Hultén, Magnus Fries: Atlas of North European vascular plants. 1986, ISBN 3-87429-263-0 at Den virtuella floran. (swed.)
- Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia )
