Dog couch grass

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Dog couch grass
Dog couch grass (Elymus caninus), illustration

Dog couch grass ( Elymus caninus ), illustration

Systematics
Commelinids
Order : Sweet grass (Poales)
Family : Sweet grasses (Poaceae)
Subfamily : Pooideae
Genre : Couch grass ( elymus )
Type : Dog couch grass
Scientific name
Elymus caninus
( L. ) L.

The couch grass ( Elymus caninus ) belongs to the genus of couch grass .

description

Illustration from Flora Batava , Volume 8
Stem with leaf sheath and ligule
Ear with spikelets
Disassembled spikelet with husk (Glu), covering (Lem) and palea (Pal)
The spikelet axis is short-haired

The couch grass grows as a perennial herbaceous plant and reaches heights of 50 to 100 centimeters. It has no runners . The leaf blade is 4 to 7, rarely up to 12 mm wide, the edges are rough, thin, hardly grooved, matt on top, shiny on the underside. The rigid ears are relatively short with a length of 1 millimeter. The ligule is 1 mm long, truncated and finely serrated.

The flowering period extends from June to August. In a terminal, flaccid and somewhat arching spike , the sitting spikelets stand individually with their width to the axis. The 0.8 to 2 cm long spikelets contain one to six flowers. The lemma has a seldom 0.7 to, usually 1 to 2.5 cm long, usually tortuous awn .

The number of chromosomes is 2n = 28.

Distribution and locations

The distribution area of ​​the couch grass stretches from Europe to Siberia and to the western Himalayas.

The couch grass is found quite often in the alluvial forest , in alluvial bushes, on banks, forest paths or in fields. It prefers oozing to fresh, humus- rich , loose loam and clay soils . According to Ellenberg , it is a weak acid to weak base pointer, a pronounced nitrogen pointer and a federation character of the alder and noble deciduous floodplain forests (Alno-Ulmion). But it also occurs in societies of the order Glechometalia hederaceae or the Filipendulion association. In the Bavarian Allgäu Alps, it rises in the Sperrbachtobel near Spielmannsau up to 1600 meters above sea level.

literature

  • Hans Joachim Conert: Parey's grass book. Recognize and determine the grasses of Germany . Parey, Berlin 2000, ISBN 3-8263-3327-6 .
  • 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 .
  • Henning Haeupler, Thomas Muer: picture atlas of the fern and flowering plants of Germany . Published by the Federal Agency for Nature Conservation (=  The fern and flowering plants of Germany . Volume 2 ). 2nd corrected and enlarged edition. Eugen Ulmer, Stuttgart (Hohenheim) 2007, ISBN 978-3-8001-4990-2 .
  • Heinz Ellenberg : Vegetation of Central Europe with the Alps in an ecological, dynamic and historical perspective (=  UTB for science. Large series . Volume 8104 ). 5th, heavily changed and improved edition. Eugen Ulmer, Stuttgart (Hohenheim) 1996, ISBN 3-8252-8104-3 .
  • Oskar Sebald, Siegmund Seybold, Georg Philippi, Arno Wörz (eds.): The fern and flowering plants of Baden-Württemberg . tape 7 : Special part (Spermatophyta, subclasses Alismatidae, Liliidae part 1, Commelinidae part 1): Butomaceae to Poaceae . Eugen Ulmer, Stuttgart (Hohenheim) 1998, ISBN 3-8001-3316-4 .

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.  232 .
  2. ↑ Rafaël Govaerts (ed.): Elymus caninus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved November 14, 2016.
  3. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 1, IHW, Eching 2001, ISBN 3-930167-50-6 , p. 211.

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