Equisetum fluviatile

Pond horsetail ( Equisetum fluviatile )

The pond or mud horsetail horsetail ( Equisetum fluviatile ) is a water - and shore plant of the genus Equisetum ( Equisetum ).

Description

The type is a Kryptophyt and reaches heights of growth from 30 to 120 (rarely 150) centimeters. Fertile ( sporangientragende ) and sterile shoots are designed the same, always green and appear simultaneously. The stems are smooth or slightly rough. You have no protruding ribs, but only grooves. The stem diameter of up to 8 mm. The scion is branched or unbranched simple. The central stalk cavity takes three-quarters of one to nine-tenths of the stem diameter. The stems leaf sheaths are close to, are glossy green and carry 10 to 30 black, slim white- hautrandige teeth. The terminal Sporangienähre is blunt ( egg-shaped ) and 10 to 20 millimeters long. The spores mature in May and June.

Confusion opportunities exist in particular with the marsh horsetail ( Equisetum palustre ). In addition, the pond horsetail bastardiert among others, the horsetail ( Equisetum arvense ); these hybrids is also known as Shore Horsetail ( Equisetum × littoral ).

The chromosome number is 2n = 216

Dissemination and locations

The pond horsetail has a circumpolar distribution in Eurasia in the meridional to boreal areas. In Austria it is used in all federal states scattered in the Pannonian area he is at risk. In Switzerland, the classification of the Südalpenflanke as vulnerable ( " vulnerable" ) and the Western Central Alps as potentially at risk ( " near threatened "). In Germany he is regarded in Berlin as endangered.

The plant grows in fens, marshes, on the banks, in large sedge vineyards, often in shallow flooded sites. It comes from the planar to the subalpine ( 1500 m) altitude level before.

Young, unbranched shoots

Sporangienähren

Documents

• Manfred A. Fischer, Wolfgang Adler, Karl Oswald: Exkursionsflora for Austria, Liechtenstein and South Tyrol. Second, improved and expanded edition. Province of Upper Austria, Biology Centre of the Upper Austrian State Museums, Linz 2005, ISBN 3-85474-140-5.
• Henning Haeupler, Thomas Muer: Image Atlas of ferns and flowering plants in Germany. Eugen Ulmer, Stuttgart 2000, ISBN 3-8001-3364-4.
• Rudolf Schubert, Klaus Werner, Hermann Meusel (ed.): Exkursionsflora the territories of the GDR and the FRG. Founded by Werner Roth painter. 13-14. Edition. Volume 2: vascular plants, people and knowledge, Berlin 1987/1988, ISBN 3-06-012539-2.
• Siegmund Seybold (ed.): Schmeil - Fitschen interactive. CD -ROM, Version 1.1, Quelle & Meyer, Wiebelsheim 2002, ISBN 3-494-01327-6.