Rooting cornices

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Rooting cornices
Root ledges (Scirpus radicans), in the illustration on the right, 2a-f

Root ledges ( Scirpus radicans ), in the illustration on the right, 2a-f

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Sourgrass family (Cyperaceae)
Genre : Ledges ( Scirpus )
Type : Rooting cornices
Scientific name
Scirpus radicans
Schkuhr

The rooting cornice ( Scirpus radicans ) is a species of the genus cornice ( Scirpus ) within the sour grass family (Cyperaceae). It is common in Eurasia .

description

The root ledge is a perennial herbaceous plant and reaches heights of 30 to 80, rarely up to 150 centimeters. It does not form runners . The sterile stalks are longer than those that have an inflorescence, they are wide-arched to the ground during the flowering period, take root at the end, and they create daughter clusters. It forms medium-sized clumps . The rigid, upright stalk is sharp, triangular. The simple leaves are flat to rutted and 6 to 12 mm wide. The flowering stems are shorter than the non-flowering ones.

The flowering period extends from May to July. The inflorescence has a diameter of 2 to 30 centimeters and is designed as a spiral . The foliage-like bracts of the Spirre are about 1 cm wide, keeled, rough on the edge and usually as long as the Spirre. The spikelets are numerous, and they are usually solitary at the branch ends of the spiral, very rarely in twos or threes. The husks are egg-shaped, rounded, they have no spike tip. The perigone bristles are about two to three times as long as the ripe fruit.

The number of chromosomes is 2n = 56 or 58.

Occurrence

The root ledge occurs in Europe and Asia (up to Japan and Korea). In Europe it mainly populates the eastern part: northwards to central Sweden and Finland , westwards to Schleswig-Holstein and the Upper Rhine region , southwards to Belfort and the Alpine foothills . In Germany there are few resources, it is more common in the Danube - rain area in, otherwise its presence in Germany have gone out many times. All deposits in Rhineland-Palatinate and Saarland are extinct. There is only one site left in Baden-Württemberg. It is also extinct in Schleswig-Holstein.

The rooting ledge prefers areas in which warm, low-precipitation summers prevail. It therefore reaches the western limit of its range in Central Europe . It occurs only sporadically to the west of the Elbe (for example, formerly isolated in the Northern Vosges , around Bitche ). It is rare in the coastal area of ​​the Baltic Sea, in the Bavarian Forest and in Austria (more recent evidence), but is absent in Switzerland . The locations of the root ledges have recently become rarer. All deposits west of the Elbe are threatened.

The radicans ledges thrives on base-rich, often calcareous , well-ventilated mud floors or muddy , sandy soil that certainly nitrogen may contain excessively high concentration. Most of the growth sites are in temporary water-bearing alternating water areas on the banks of oxbow lakes, rivers or ponds. It can both grow on the dried-out bed of the water and form floating, non-rooted herds on the surface of the water.

The species is a character species of its own plant community , the Scirpetum radicantis. Characteristic companions in the species-poor pioneer society are Alisma plantago-aquatica and Eleocharis palustris .

Taxonomy and systematics

Scirpus radicans was first described by Christian Schkuhr in 1793 . The homonym Scirpus radicans Poir. is a synonym of the species Eleocharis radicans ( nomen illegitimum ). The species belongs in the genus to the subgenus Scirpus s. st. Their affiliation has been confirmed in more recent work, also using molecular methods (comparison of homologous DNA sequences).

literature

  • 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 .
  • Dietmar Aichele, Heinz-Werner Schwegler: The flowering plants of Central Europe. 2nd Edition. Volume 5: Swan flowers to duckweed plants. Franckh-Kosmos, Stuttgart 2000, ISBN 3-440-08048-X .
  • Oskar Sebald, Siegmund Seybold, Georg Philippi, Arno Wörz (eds.): The fern and flowering plants of Baden-Württemberg. Volume 8: Special part (Spermatophyta, subclasses Commelinidae part 2, Arecidae, Liliidae part 2): Juncaceae to Orchidaceae . Eugen Ulmer, Stuttgart 1998, ISBN 3-8001-3359-8 .

Individual evidence

  1. ^ 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.  163 .
  2. ↑ Georg Phillipi: Scirpus. In: O.Sebald, S.Seybold, G.Philippi, A.Wörz (editor): The fern and flowering plants of Baden-Württemberg. Volume 8. Eugen Ulmer Verlag, 1998. ISBN 3-8001-3359-8
  3. ^ State Office for Nature and Environment of the State of Schleswig-Holstein (publisher): The fern and flowering plants of Schleswig-Holstein. Red List. Volume 1. 4th version - data status December 2005. Edition August 2006 ISBN 3-937937-06-4
  4. ↑ Albin Lugmair: Bidens radiata, Bolboschoenus planiculmis, Cotinus coggygria and Hyacinthoides nonscripta new for Upper Austria, as well as other vascular plant finds worth reporting. In: Stapfia. Volume 95, Linz 2011, pp. 85-91, PDF on ZOBODAT
  5. ↑ Krzysztof Spałek & Arkadiusz Nowak (2003): Scirpetum radicantis Hejný in Hejný et Husák 1978 em. Pay 1979, a plant association new to Poland. Acta Societatis Botanicorum Poloniae Vol. 72, no. 4: 347-350. doi : 10.5586 / asbp.2003.046
  6. ↑ Léveillé-Bourret, É., Gilmour, CN, Starr, JR, Naczi, RFC, Spalink, D., Sytsma, KJ (2014): Searching for the sister to sedges (Carex): resolving relationships in the Cariceae-Dulichieae- Scirpeae clade (Cyperaceae). Botanical Journal of the Linnean Society 176: 1-21. doi : 10.1111 / boj.12193

Web links

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