Impoverished sedge

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Impoverished sedge
Carex depauperata - Botanical Garden, University of Frankfurt - DSC02725.JPG

Impoverished sedge ( Carex depauperata )

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Sedges ( Carex )
Type : Impoverished sedge
Scientific name
Carex depauperata
Gooden. ex With.

The impoverished sedge or arm-flowered sedge ( Carex depauperata ) is a species of the genus of sedges ( Carex ) within the family of sour grass plants (Cyperaceae).

description

The impoverished sedge is a perennial herbaceous plant that reaches stature heights of 30 to 60, rarely up to 100 centimeters. It grows loose grass with short runners . The rigid upright stems are bluntly triangular and smooth. The simple, flat, bare and rough leaves are 3 to 4 mm wide and about the same length as the stem. The abdominal vaginal wall has no membranous appendage. The basal leaf sheaths are purple.

The impoverished sedge belongs to the variety of sedges. There is a male spikelet that is narrow, up to 3 inches long and loosely-flowered. The two to three female spikelets each contain five to six flowers, are 1 to 1.5 centimeters long, and a maximum of five times as long as they are wide. They stand upright, have short stems, and stand apart. The bracts have long sheaths and sometimes rise above the inflorescence. The greenish to pale yellow bracts have a brown skin edge. They are egg-shaped and sharply pointed. They are much shorter than the fruit. The stylus has three scars .

The bare, silvery-gray fruit is up to 10 millimeters long, bluntly triangular, clearly multi-veined and gradually narrows into the short, two-toothed beak.

The number of chromosomes is 2n = 44 or 74.

Occurrence

The impoverished sedge occurs from Europe to Central Asia. It is a submeridional-montane to south-temperate, oceanic flora element . Their main distribution area is in southern Europe . In Central Europe it occurs very rarely in deciduous forests in the southwest (for example in the Swiss Jura ), in the west (in the Sauer Valley near Echternach ) and in Austria.

It grows in warmth-loving deciduous forests and is demanding. It thrives in a humid, mild winter climate and avoids direct sunlight; she prefers middle altitudes. It shows garbage floor . The impoverished sedge thrives best on fresh, nutrient-rich , loose, humus-rich , stony, lime-poor or lime-free soils . It thrives in societies of the Quercetalia pubescentis order, but also occurs in those of the Carpinion society.

In Germany, the impoverished sedge was considered lost for a long time until a specimen was rediscovered near Echternacherbrück on the Luxembourg border in 2011 . In 2013, employees of the Berlin-Dahlem Botanical Garden succeeded in cultivating the impoverished sedge. In Great Britain , where it occurs in two places (in Somerset and near Godalming train station ), it was reintroduced in 2010 near the Charterhouse School , also in Godalming , where it was considered extinct since the 1940s.

swell

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. ↑ Impoverished sedge. In: FloraWeb.de.
  2. ↑ 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.  189 .
  3. ↑ Rafaël Govaerts (ed.): Carex depauperata. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 18, 2016.
  4. ↑ a b 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 .
  5. ↑ Christoph Seidler: Germany's rarest plant: Save the impoverished sedge . In: Spiegel Online . June 27, 2013. Retrieved June 27, 2013.
  6. ^ Rare plans reintroduced at Charterhouse in Surrey . In: BBC News . March 24, 2010, accessed June 27, 2013.

Web links

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