Arm-flowered sedge

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Arm-flowered sedge
Arm-flowered sedge (Carex pauciflora)

Arm-flowered sedge ( Carex pauciflora )

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Sedges ( Carex )
Type : Arm-flowered sedge
Scientific name
Carex pauciflora
Lightf.

The arm-flowered sedge ( Carex pauciflora ) is a species of the genus of the sedge ( Carex ) within the sour grass family (Cyperaceae). It is common in the northern hemisphere .

description

inflorescence

The arm-flowered sedge is a perennial herbaceous plant that reaches heights of 5 to 20 centimeters. It can form aboveground runners . The upright stems are bluntly triangular, smooth and up to 1 millimeter thick. The leaves are very narrow and bristle-shaped and much shorter than the stem.

The flowering period is between May and June. The inflorescence consists of a single spikelet . The 5 to 10 millimeter long spikelet contains one to three male flowers at the top and two to five female flowers below. The husks of the female flowers are light brown to rusty red, with green central veins and white-skinned edges. The fruit sacs are spindle-shaped and pointed into a long beak, yellowish and 6 to 7 mm long, they protrude above the husks and are later inclined downwards.

The number of chromosomes is 2n = 76.

Occurrence

The arm-flowered sedge is circumpolar in the temperate to boreal areas of the northern hemisphere in Eurasia and North America . In Europe , its area extends mainly to Northern and Central Europe; it further extends from Scotland and Fennoscandia through northern Russia to western Siberia . In Central Europe it occurs from the French Massif Central in the west, especially over the low mountain ranges there to the Alpine foothills and the Alps . In the east it occurs as far as the Carpathian Mountains . There are also scattered occurrences in northeastern Anatolia and in some Central Asian mountains, also in East Asia from Kamchatka to Japan and Korea as well as in North America.

The arm-flowered sedge is an Ice Age relic in the Central European lowlands . In Central Europe it is rare and has declined in many places. The arm-flowered sedge disappeared from many growing varieties in the 1990s. Amazingly, it could not survive even in the large raised bogs of the lowlands, not even in the protected areas. It is very rare in the low mountain ranges with high levels of precipitation and rock poor in lime; it is rare in the Alpine foothills and in the Alps. In the Alps it rises to altitudes of 2050 meters; it usually remains below the tree line . In the Allgäu Alps , it rises on the Schnippenkopf in Bavaria to an altitude of 1830 meters.

The arm-flowered sedge thrives on nutrient-poor, acidic, wet and at least occasionally flooded peat soils that largely lack nitrogen salts and bases, in raised bogs . She cannot endure cultivation measures . Fertilization destroys them. It is extremely sensitive to nitrogen administration . The arm-flowered sedge is a species of the Sphagnetum medii and the Eriophoro-Trichophoretum cespitosi. It is also less common in societies of the Caricion fuscae association.

Taxonomy

Carex pauciflora was first published by John Lightfoot . The specific epithet pauciflora means little flowered.

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. 110 (published in deliveries 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. 322 (English, limited preview in Google Book Search).
  • Oskar Sebald, Siegmund Seybold, Georg Philippi, Arno Wörz (eds.): The fern and flowering plants of Baden-Württemberg . tape 8 : Special part (Spermatophyta, subclasses Commelinidae part 2, Arecidae, Liliidae part 2): Juncaceae to Orchidaceae . Eugen Ulmer, Stuttgart (Hohenheim) 1998, ISBN 3-8001-3359-8 .
  • 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 , p. 248 .

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. 168 .
  2. ↑ Erhard Dörr , Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 1, IHW, Eching near Munich 2001, ISBN 3-930167-50-6 , p. 238.

Web links

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