Alpine knotweed

Alpine knotweed
	Alpine knotweed ( Persicaria alpina )
Systematics
	Eudicotyledons
	Nuclear eudicotyledons
Order :	Clove-like (Caryophyllales)
Family :	Knotweed family (Polygonaceae)
Genre :	Knot oak ( Persicaria )
Type :	Alpine knotweed
Scientific name
	Persicaria alpina
	( All. ) H.Gross

The alpine knotweed ( Persicaria alpina ) is a species of knotweed ( Persicaria ) in the knotweed family (Polygonaceae).

features

The alpine knotweed is a perennial, herbaceous plant that reaches heights of 30 to 50, rarely up to 100 centimeters. The rhizome that creeps underground is short and forms roots at the nodes. Erect, simple or branched, angular-striped stems sprout from it. The sometimes slightly wavy leaves are short-stalked, ovate-lanceolate and narrow at both ends. The upper side is dark green, the underside lighter in color, the leaves are ciliate on the nerves and on the edge. The flowers are small and white, yellowish-white or light pink in color. They are arranged in terminal, loose panicles individually or 2 to 3 together.

Flowering time is from June to September.

The number of chromosomes is 2n = 20.

Occurrence

The alpine knotweed occurs from the mountains of Central, Southern and Eastern Europe to Southwest Asia at altitudes of 700 to 2000 meters on lime-poor, acidic, moist soils and in green alder bushes. In Austria it is only known through serpentine rock from a mountain near Bruck an der Mur .

Systematics

Due to the non-uniform systematics within the knotweed, the species is classified as belonging to different genera: originally described as a species of the Aconogonon section of the Polygonum genus , it is also included in the independent Aconogonon (or Aconogonum) genus, depending on the processor and the position of this section chosen by him ), Rubrivena , Koenigia or Persicaria s. l. posed.

supporting documents

literature

Gunter Steinbach (Ed.): Alpine flowers (Steinbach's natural guide). Mosaik Verlag GmbH, Munich 1996, ISBN 3-576-10558-1 .

Individual evidence

^ Polygonum alpinum at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
^ ^A ^b Manfred A. Fischer , Karl Oswald, Wolfgang Adler: Excursion flora for Austria, Liechtenstein and South Tyrol. 3rd, improved edition. State of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2008, ISBN 978-3-85474-187-9 .

Web links

Commons : Alpen-Knöterich ( Aconogonon alpinum ) - Album with pictures, videos and audio files

Alpine knotweed. In: FloraWeb.de.
Distribution map for Germany. In: Floraweb .
Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia )

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

[Fischer-2] A ^b Manfred A. Fischer , Karl Oswald, Wolfgang Adler: Excursion flora for Austria, Liechtenstein and South Tyrol. 3rd, improved edition. State of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2008, ISBN 978-3-85474-187-9 .