Valais schiller grass
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Valais Schillergrass ( Koeleria vallesiana ) |
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| ( Honck. ) Gaudin |
The Walliser Schillergras ( Koeleria vallesiana ), also called Walliser Kammschmiele , is a species of the genus Schillergräser ( Koeleria ) and thus the family of the sweet grasses (Poaceae).
description
The Valais Schillergras is a perennial grass that forms dense, hard clumps with short underground runners and numerous renewal shoots. The renewal shoots are 2–3 surrounded by numerous fraying leaf sheaths, the fibers of which cross each other and form a tight network. The stalks are 10–40 centimeters high, erect and only briefly hairy under the panicle, less often with densely shaggy hairs over their entire length. The ligule is 0.5–1 millimeters long, collar-shaped and glabrous. The leaf blades of the renewal shoots are 3–12 centimeters long, rolled up like bristles, those of the stalk leaves are flat and then 2 millimeters wide. The flower panicle is 2–7 centimeters long and 6–12 millimeters wide, dense, contracted, cylindrical, greenish-white, often purple, shiny, not interrupted at the base; their main axis is hairy shaggy. The spikelets are 2–5 flowered, 4–6 (–8) millimeters long. The glumes are almost alike, the lower one single-nerved, the upper three-nerved. The lemmas are three- veined , 4–6 millimeters long, lanceolate, pointed with a whitish transparent margin. The palea are two-veined, 3.5–4.5 millimeters long. The anthers are 2–2.5 millimeters long. The flowering time is May to June, less often until August.
The chromosome number is 2n = 14, 28, 40 or 42.
distribution
The Valais schiller grass occurs from western Europe and western central Europe to north-west Africa. In Germany it thrives on the northern border of the distribution and occurs only on the Rotenberg near Nackenheim , but also in Alsace near Rouffach . The species rises in the canton of Valais up to 2080 meters above sea level.
ecology
The Walliser Kammschmiele occurs in gappy dry grass, on rocky slopes on warm, dry, lean, lime-rich, mild, humus-rich, mostly shallow, stony loam soils. She is a character species of the Xerobromion Association.
Taxonomy
The Valais Schillergras was first described by Gerhard August Honckeny as Poa vallesiana in Verz. Gew. Teutschl .: 222, 1782. Jean Gaudin placed it in Alpina 3: 47 (1808) as Koeleria vallesiana in the genus Koeleria . Synonyms for Koeleria vallesiana (Honck.) Gaudin are : Aira vallesiana (Honck.) All. , Airochloa vallesiana (Honck.) Link , Koeleria vallesiana subsp. alpicola (Godr. & Gren.) Asch. & Graebn. , Koeleria vallesiana subsp. Castellana (Boiss. & Reut.) Domin and Koeleria setacea var. glabra Godr.
literature
- Hans Joachim Conert: Koeleria vallesiana . In: Gustav Hegi : Illustrated flora of Central Europe . 3rd ed., Volume I, Part 3, pages 271-273. Verlag Paul Parey, Berlin, Hamburg, 1987. ISBN 3-489-52320-2 (description, distribution, ecology)
Individual evidence
- ↑ a b c 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. 249 .
- ↑ a b Rafaël Govaerts (ed.): Koeleria vallesiana. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved June 17, 2020.
