Rough horsetail
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| Rough horsetail | ||||||||||||
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Rough horsetail, herbarium specimen |
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| Equisetum × trachyodon | ||||||||||||
| ( A.Braun ) WDJKoch |
When roughening horsetail ( Equisetum × trachyodon ( A. Braun ) WDJKoch ) is a hybrid between Equisetum hyemale and Equisetum variegatum from the genus Equisetum ( Equisetum ) within the family of horsetails (Equisetaceae). It is widespread in northern Europe as far as Greenland.
description
The rough horsetail is a rhizome chamaephyte . Spore-bearing and non-spore-bearing rungs are designed in the same way. The shoot axes reach a length of 20 (to 100) cm. They are only branched at the base, very rough and have 7-14 ribs. The central cavity of the rung has a width of 1/4 to 1/3 of the diameter. The leaf sheaths have a weakly developed cartilage bulge on the upper edge, are often monochrome black and have white-skin-edged, black teeth that appear rough due to thorn- or hook-shaped silicate deposits on the back. The spores are aborted.
Occurrence
Lake Constance High Rhine and Aare regions, Upper Rhine to Mainz, the Netherlands, Scandinavia , England, Iceland, Greenland.
The rough horsetail grows in loose to moderately dense herds in light-rich to weakly shaded, fresh (to moist), also at times flooded, sandy-gravelly to silty, lime-rich, basic, but nutrient-poor places in pioneering societies, in gravel pits, in gappy marsh grass meadows, too in light bank bushes or between stone packings of the dams. It is a character species of the Cirsio-Molinietum in the Upper Rhine region, but also occurs in societies of the Caricion bicoloris-atrofuscae association.
literature
- Schmeil-Fitschen: The flora of Germany and the neighboring countries . 95th edition, 2011, ISBN 978-3-494-01498-2
- Henning Haeupler , Thomas Muer: picture atlas of the fern and flowering plants of Germany (= the fern and flowering plants of Germany. Volume 2). 2nd, corrected and enlarged edition. Published by the Federal Agency for Nature Conservation. Ulmer, Stuttgart 2007, ISBN 978-3-8001-4990-2 .
- Oskar Sebald, Siegmund Seybold, Georg Philippi: The fern and flowering plants of Baden-Württemberg . Ulmer Verlag, Volume 1, ISBN 978-3-8001-3322-2
- Rough horsetail. In: FloraWeb.de.
Individual evidence
- ↑ a b Marcus Lubienski: The horsetail (Equisetaceae, Pteridophyta) of the flora of Germany - an updated identification key. Yearbook of the Bochum Botanical Association. Vol. 2, 2011, pp. 68–86 ( PDF 6.7 MB)
- ^ 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. 64-65 .
Web links
- Equisetum trachyodon (A. Braun) WDJ Koch, Rough-toothed horsetail. In: FloraWeb.de.
- Rough horsetail . In: BiolFlor, the database of biological-ecological characteristics of the flora of Germany.
- Equisetum x trachyodon A. Braun In: Info Flora , the national data and information center for Swiss flora . Retrieved July 16, 2016.
- Thomas Meyer: Horsetail data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia )