Blue-green Schillergrass
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Blue-green Schillergrass ( Koeleria glauca ) |
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| ( Explosive ) DC. |
The blue-green Schillergras ( Koeleria glauca ), also called blue-green comb-smith or blue-gray Schillergras , is a plant species from the genus Schillergräs ( Koeleria ) and thus the family of the sweet grasses (Poaceae).
description
The blue-green Schillergras is a perennial grass that forms blue-green, dense pads. Culms and renewal shoots are thickened in the shape of an onion. 2–3 renewal shoots are covered together by a covering of dead leaf sheaths that disintegrate into parallel strips. The stalks are 20–50– (90) centimeters high, strong, upright or upright-ascending, sometimes bald in the lower part, but at least in the upper part short and softly hairy. Each stalk has 3–4 knots that are bare. The ligule is a 1 millimeter long, ciliate, collar-shaped, membranous border. The leaf blades are 2–5 centimeters long and 1–2 millimeters wide, they are stiff, curled up into rivulets, very rough on both sides and spiky at the edges. The flower panicle is 2–12 centimeters long and 6–15 millimeters wide, more or less dense, cylindrical, greenish-white or yellowish-white. The side branches are short, rarely the bottom 25 millimeters long. The spikelets are 2–3 flowered, 4–5 millimeters long. The lower one of the glumes is one-nerved, the upper three-nerved. The lemmas are three- veined , 3.2 to 4 millimeters long, rounded at the top, but sometimes with a 1 millimeter long awn tip. The palea are two-veined and ciliate briefly on the protruding keels. The anthers are 1.5 to 2 millimeters long.
The flowering period is June to July, less often to August.
The number of chromosomes is 2n = 14, less often 28, 42 or 70.
distribution
The blue-gray Schillergrass occurs from Europe to Mongolia. The species is widespread in the drifting sand areas of Eastern Europe and occurs from there westward to the Elbe and also on the East Frisian islands. An isolated partial area exists on the Upper Rhine.
ecology
The blue-green Schillergrass thrives in Central Europe in the sandy lawns of inland dunes on warm, dry, lean, alkaline, mostly calcareous, neutral, humus-rich, loosely permeable sandy soils with little fine soil. It is a character species of the association Koelerion glaucae, more rarely it occurs in societies of the association Cytiso-Pinion. The moss gray serrated cap ( Niphotrichum canescens , Syn .: Racomitrium canescens ) is often accompanying species .
Taxonomy
Koeleria glauca was named Aira glauca in Bot. Gart by Kurt Sprengel . Hall, Nachtr. 1:10 (1801) first described. Later Augustin-Pyrame de Candolle introduced it as Koeleria glauca (Spreng.) DC. in Cat. Pl.Horti Monsp .: 117 (1813) in the genus Koeleria . Synonyms of Koeleria glauca (Spreng.) DC. are: Koeleria cristata var. glauca (Spreng.) G.Mey. , Koeleria macrantha subsp. glauca (Spreng.) PDSell and Dactylis glauca (Spreng.) Roth .
natural reserve
The blue-green Schillergras is a relic of the late glacial pine-steppe period in the Upper Rhine region. The Jurineo-Koelerietum glaucae association is one of the most endangered plant communities in southern Germany.
literature
- Hans Joachim Conert: Koeleria glauca . In: Gustav Hegi : Illustrated flora of Central Europe . 3rd ed., Volume I, Part 3, pages 273-275. Verlag Paul Parey, Berlin, Hamburg, 1987. ISBN 3-489-52320-2 (description, distribution, ecology)
Individual evidence
- ↑ 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. 248 .
- ^ Rafaël Govaerts (ed.): Koeleria glauca. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved June 14, 2020.
