Six-man barrel

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Six-man barrel
Six-male tank (Elatine hexandra)

Six-male tank ( Elatine hexandra )

Systematics
Rosids
Eurosiden I
Order : Malpighiales (Malpighiales)
Family : Barrel family (Elatinaceae)
Genre : Tännel ( Elatine )
Type : Six-man barrel
Scientific name
Elatine hexandra
( Lapierre ) DC.

The Sechsmännige waterwort ( Elatine hexandra ), also stem waterwort- or Sechsstaubblättriger waterwort called, is a plant of the genus Elatine within the family of elatinaceae (Elatinaceae). He thrives in Europe in fresh water .

description

Illustration from Flora Batava , Volume 17

The six-male Tännel is an annual herbaceous plant . The stem is 2 to 20 centimeters long. The leaves are entire .

The flowering period extends from June to September. The flower stalk is usually 0.5 to 5, rarely up to 10 millimeters long. The hermaphrodite flowers are threefold with a double flower envelope . The chalice is in three parts. The three pink or white petals are longer than the calyx. There are six stamens .

The seeds are almost straight and have distinct longitudinal ribs.

The number of chromosomes is 2n = 72 or 108.

Occurrence

The six-man Tännel occurs only in Europe. The greatest distribution density is in France , otherwise the area is fragmented into numerous individual occurrences. The southwest border is in Portugal , the northern border in southern Sweden and southern Norway at 62 ° north latitude. The eastern border lies in Silesia , Moravia and Transylvania . In Central Europe one finds it in the area of ​​the low mountain ranges sporadically in areas with pond farms , also in the lowlands; it occurs very rarely in the pond area between Schwarznach and Regen , also in western Switzerland , at the southern foot of the Alps and in Lower Austria . But it is also relatively common in the rice-growing region of northern Italy . Since its seeds are carried away by water birds , new settlements - especially at the southern foot of the Alps, perhaps also in southern Germany - are always to be expected.

The six-man Tännel thrives on lime and, above all, nitrogen-poor soils , but it also grows on moderately alkaline mud.

It inhabits little deep places on the banks of ponds and ponds , but also goes into backwaters, less often in near-water, temporarily flooded and permanently wet bank areas. In Central Europe it is a character species of the Eleocharitetum acicularis, but also occurs in other societies of the order Cyperetalia.

literature

  • Siegmund Seybold : The flora of Germany and the neighboring countries. A book for identifying all wild and frequently cultivated vascular plants . Founded by Otto Schmeil , Jost Fitschen . 95th completely revised and expanded edition. Quelle & Meyer, Wiebelsheim 2011, ISBN 978-3-494-01498-2 .
  • Eckehart J. Jäger (ed.): Excursion flora from Germany. Vascular plants: baseline . Founded by Werner Rothmaler. 20th, revised and expanded edition. Spektrum Akademischer Verlag, Heidelberg 2011, ISBN 978-3-8274-1606-3 .
  • 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 .
  • Oskar Sebald, Siegmund Seybold, Georg Philippi (Hrsg.): The fern and flowering plants of Baden-Württemberg . tape 2 : Special part (Spermatophyta, subclass Dilleniidae): Hypericaceae to Primulaceae . Eugen Ulmer, Stuttgart (Hohenheim) 1990, ISBN 3-8001-3312-1 .
  • Dietmar Aichele, Heinz-Werner Schwegler: The flowering plants of Central Europe . 2nd Edition. tape 3 : Evening primrose plants to reddish plants . Franckh-Kosmos, Stuttgart 2000, ISBN 3-440-08048-X .

Individual evidence

  1. ↑ IPCN Chromosome Reports
  2. ↑ Dietmar Aichele, Heinz-Werner Schwegler: The flowering plants of Central Europe . 2nd Edition. Volumes 1-5. Franckh-Kosmos, Stuttgart 2000, ISBN 3-440-08048-X , p. 667 .

Web links

Commons : Sechsmänniger Tännel ( Elatine hexandra )  - Collection of images, videos and audio files