Water sedge

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Water sedge
Carex aquatilis NRCS-2.jpg

Water sedge ( Carex aquatilis )

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Sedges ( Carex )
Type : Water sedge
Scientific name
Carex aquatilis
Election b.

The water sedge ( Carex aquatilis ) is a species of the genus Seggen ( Carex ). It is common in the northern hemisphere in North America and Europe .

description

The water sedge is a perennial herbaceous plant and reaches stature heights of 30 to 90, rarely up to 130 centimeters. It grows loosely in clusters with elongated runners . The blunt triangular stems have flat sides and are rough below the inflorescences. The 3 to 7 mm wide leaves are longer than the stem, simply folded and not bent back. The underside of the leaf is glossy green and the upper side is matt gray-green. The basal sheaths have spreads, are purple-brown to reddish brown and do not fray like a network.

The water sedge is a variegated sedge. Male and female spikelets are different. The spikelets are spaced apart. There are one to four male and three to five female spikelets. The females are 40 to 70 mm long, densely flowered and have a short stalk. They stand upright and overlap each other. The lowest bract is longer than the inflorescence. The upper bracts also have at least a short blade. The bracts of the female flowers are purple to copper-colored. They have a light keel and a white skin edge and are blunt. There are two scars .

The fruit is 2 to 3 mm long, green, glabrous and almost veinless. It has slightly protruding marginal edges and is wider than its supporting sheet. Most of the fruits are sterile. They don't have a beak.

The number of chromosomes is 2n = 76 or 84.

Occurrence

The water sedge grows in backwaters, bog streams, it is circumpolar and is a temperate to arctic, subcontinental flora element . It is common in the northern hemisphere in North America and Europe . It occurs south to central Europe. In Germany it is restricted to the northwest of Lower Saxony . It occurs in the Netherlands and East Prussia . It can even be found in Antarctica.

Systematics

One can differentiate between the following varieties:

  • Carex aquatilis var. Aquatilis : It occurs from Europe to Siberia and from Canada to the United States.
  • Carex aquatilis var. Dives (Holm) Kük. : It occurs from southern Alaska to the western United States.
  • Carex aquatilis var. Minor Boott : It occurs from the subarctic region to eastern Canada.
  • Carex aquatilis var. Substricta Kük. : It occurs from southern Canada to the northern United States.

literature

  • 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. ^ 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.  183 .
  2. ^ Peter Mühlbauer: Study: Antarctica is greening. 20th May 2017.
  3. ↑ a b c d e Rafaël Govaerts (Ed.): Carex aquatilis. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 16, 2016.

Web links