Blue-green bulrush
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Blue-green rush ( Juncus inflexus ) |
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The blue-green rush ( Juncus inflexus ), also known as the gray-green rush , is a species of plant within the rush family (Juncaceae). The gray to blue-green color of its bristly stems and leaves is characteristic of this rush .
description
Vegetative characteristics
The blue-green rush is a perennial herbaceous plant . It reaches an average height of up to 80 centimeters, more rarely it is up to 120 centimeters high. It forms dense clumps . The stem base is surrounded by black-brown, glossy and spiderless leaf sheaths . The round gray to blue-green stems grow rigidly upright. They are especially provided with 12 to 16 longitudinal ribs under the inflorescence and only one leaf protruding above the inflorescence. Therefore, the inflorescences appear laterally. The stems are filled with a spongy, chambered pith.
Generative characteristics
The flowering period extends from June to August. The inflorescence, which is up to 5 centimeters long, is a loose, multi-flowered sessile spiral . The six tepals are between 2.5 and 4 millimeters long and have a green central stripe. They are a little longer than the fruit. The three scars are reddish. The capsule fruit is triangular, pointed and dark chestnut brown.
The number of chromosomes is 2n = 40.
Distribution and location
The blue-green bulrush is widespread in Europe , north to Scotland and Sweden . There are also populations in North and South Africa as well as in temperate and tropical Asia . The bulrush is naturalized in Australia , New Zealand and North America .
The blue-green bulrush grows in bogs , on damp pastures , in wet meadows , on roadsides and in forest cuts on moist, nutrient-rich and base-rich loam and clay soils . It is a characteristic species of Mentho-longifoliae-Juncetum -inflexi.
In the Allgäu Alps , it rises in the Ziebelmoos northwest of Rohrmoos in Bavaria to an altitude of up to 1420 meters.
Systematics
The first description of Juncus inflexus was in 1753 by Carl von Linné in Species Plantarum . A synonym for Juncus inflexus L. is Juncus glaucus Sibth.
There are two subspecies:
- Juncus inflexus subsp. brachytepalus (Trautv. ex VIKrecz. & Gontsch.) Novikov , with orange-red lower leaf sheaths, stems up to 1 cm thick at the base and capsules clearly protruding from the perianth. Their distribution area extends from Central Asia to Central China.
- Juncus inflexus L. subsp. inflexus , with more or less dark cherry-red lower leaf sheaths, at the base only 3 to 5 mm thick stem and capsule fruit, which is about the same length as the flower cover. Apart from gaps in Central Asia, their range corresponds to that of the species as a whole.
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literature
- Jürke Grau , Bruno P. Kremer, Bodo M. Möseler, Gerhard Rambold, Dagmar Triebel: Grasses. Sweet grasses, sour grasses, rushes and grass-like families in Europe (= Steinbach's natural guide ). New, edit. Special edition edition. Mosaik, Munich 1996, ISBN 3-576-10702-9 .
- Henning Haeupler, Thomas Muer: picture atlas of the fern and flowering plants of Germany . Ed .: Federal Agency for Nature Conservation (= The fern and flowering plants of Germany . Volume 2 ). Eugen Ulmer, Stuttgart (Hohenheim) 2000, ISBN 3-8001-3364-4 .
- Erich Oberdorfer : Plant-sociological excursion flora . With the collaboration of Theo Müller. 7th, revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 1994, ISBN 3-8252-1828-7 .
Individual evidence
- ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Stuttgart, Verlag Eugen Ulmer, 2001. Page 148. ISBN 3-8001-3131-5 .
- ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 1, IHW, Eching 2001, ISBN 3-930167-50-6 , p. 298.
- ↑ Carl von Linné: Species Plantarum. Volume 1, Impensis Laurentii Salvii, Holmiae 1753, p. 326, digitized
- ↑ a b c Rafaël Govaerts (Ed.): Juncus inflexus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 9, 2013.
- ↑ a b V. I. Krechetovich, NF Goncharov: Juncus . In: BK Schischkin (ed.), N. Landau (transl.): Flora of the USSR Volume III. Israel Program for Scientific Translations, Jerusalem 1964, pp. 402, 433 (English; Russian original: Izdatel'stvo Akademii Nauk SSSR, Moscow-Leningrad 1935, pp. 509, 547) Digitized .
Web links
- Blue-green bulrush. In: FloraWeb.de.
- Blue-green bulrush . 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 .
- Juncus inflexus L. 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 )
- Juncus inflexus inthe IUCN 2013 Red List of Threatened Species . 2. Posted by: AK Gupta, 2011. Retrieved April 11, 2014.
