Perching pond cress

Perching pond cress
	Perching pond cress ( Rorippa anceps ), herbal specimen
Systematics
	Eurosiden II
Order :	Cruciferous (Brassicales)
Family :	Cruciferous vegetables (Brassicaceae)
Tribe :	Cardamineae
Genre :	Marsh cress ( Rorippa )
Type :	Perching pond cress
Scientific name
	Rorippa anceps
	( Wahlenb. ) Rchb.

The low marsh cress ( Rorippa anceps , syn. Rorippa prostrata ) is a species of the genus marsh cress ( Rorippa ) within the cruciferous family (Brassicaceae).

description

The low-lying marsh cress is a perennial herbaceous plant that reaches heights of 30 to 100 centimeters. The leaves are variable, pinnate to pinnate, rarely undivided, usually with a large end section, the upper ones are petiolate.

The flowering period extends from May to September. The hermaphrodite flowers are fourfold. The four petals are 3.5 to 5 millimeters long.

The fertile pods are 5 to 8 (sometimes up to 11) millimeters long and 1 to 2.5 millimeters wide, their stems are usually turned down. The fruit pen is 1 to 2.5 millimeters long.

The number of chromosomes is 2n = 32.

Occurrence

The lower pond cress occurs in the temperate areas of Europe. Their distribution area extends north to southern Sweden.

The low marsh cress grows on nutrient-rich, mostly calcareous mud soils on banks with strongly fluctuating water levels; especially in floodplain and silted vegetation. In Central Europe it is considered a character species of the Phalaridetum arundinaceae from the Magnocaricion association, but also occurs in societies of the Agropyro-Rumicion association.

literature

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 (= 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 (Hrsg.): The fern and flowering plants of Baden-Württemberg. Volume 2: Special part (Spermatophyta, subclass Dilleniidae): Hypericaceae to Primulaceae. Eugen Ulmer, Stuttgart 1990, ISBN 3-8001-3312-1 .

Individual evidence

^ Rorippa anceps at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
^ 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. 470 .

Web links

Commons : Perching watercress ( Rorippa anceps ) - Collection of images, videos, and audio files

Rorippa anceps (Wahlenb.) Rchb., Lower pond cress. In: FloraWeb.de.
Distribution map for Germany. In: Floraweb .
Perching pond cress . In: BiolFlor, the database of biological-ecological characteristics of the flora of Germany.
Rorippa x anceps (Wahlenb.) Rchb. In: Info Flora , the national data and information center for Swiss flora . Retrieved October 29, 2015.
Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia )
Data sheet with photos of Rorippa x anceps (WAHLENB.) RCHB. - Hybrid formula (parents) / Hybrid formula (parents): Rorippa amphibia (L.) BETTER x Rorippa sylvestris (L.) BETTER .
Images: leaves , inflorescence , leaves , fruits

[IPCN-1] Rorippa anceps at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis

[Oberdorfer2001-2] 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. 470 .