Knotweed

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Knotweed
Knotweed (Fallopia baldschuanica)

Knotweed ( Fallopia baldschuanica )

Systematics
Eudicotyledons
Nuclear eudicotyledons
Order : Clove-like (Caryophyllales)
Family : Knotweed family (Polygonaceae)
Genre : Winged knotweed ( fallopia )
Type : Knotweed
Scientific name
Fallopia baldschuanica
( Rule ) Holub

The knotweed ( Fallopia baldschuanica ) is a type of plant from the knotweed family .

use

inflorescence
Single flower

The knotweed, which winds like a hop, can be used with climbing aids, e.g. B. as a facade greening , also facing north, grow 9 to 15 meters high. The woody and hardy climber has approx. 8 cm long broad, heart-shaped to egg-shaped leaves and a multitude of greenish-white, later white-pink to yellowish flower panicles during the flowering period (June to October). The knotweed is fast growing. He needs sufficiently large climbing areas and can quickly green larger facades. That's why he's also called the architect's consolation. The knotweed is also very popular with beekeepers because the flowers are a very good pasture for bees. The long flowering period is an advantage, since during this time the food supply in nature for insects begins to decline.

disadvantage

The extreme vigor can also be a disadvantage, because the plant is so dominant that it displaces other climbing plants. Since the knotweed continues to grow up to 30 cm daily, it often spreads uncontrollably to neighboring buildings or plants, where it is very difficult to remove. The strong trunk that develops can entangle trees, gutters, and other nearby objects, damaging them. In order to stop the vigor, the plant should then be cut back radically in February / March. In extreme cases, it is advisable to remove the knotweed, which is very time-consuming due to the roots being up to two meters deep.

Chromosome number

The number of chromosomes is 2n = 20.

distribution

The knotweed was originally only widespread in Tajikistan . According to other authors, it also occurs originally in China, Afghanistan and Pakistan. It is an often undesirable neophyte in the British Isles, Spain, Central Europe (mainly Austria) and Romania, but also in North America, Costa Rica and New Zealand.

Knotweed ( Fallopia baldschuanica )

Taxonomy

The determination of the botanical name has a complex history. The first person to describe this species is Eduard August von Regel , who collected it himself in 1883 in what is now Tajikistan and named it Polygonum baldschuanicum in 1884 . In 1899, Louis Henry received fruit from Fr. George Aubert from Asia , from which he cultivated a plant specimen. The description of this plant was then published by Henry in 1907 under the name Polygonum aubertii . Both Polygonum baldschuanicum and Polygonum aubertii were later placed in Bilderdykia and finally in 1971 by Josef Holub in Fallopia . Holub also proved that both names belong to the same species and that the valid name - according to the priority rule - must be Fallopia baldschuanica (rule) Holub . Synonyms are: Polygonum baldschuanicum Regel , Polygonum aubertii L. Henry , Fallopia aubertii (L. Henry) Holub , Bilderdykia baldschuanica (Regel) DA Webb , Bilderdykia aubertii (L. Henry) Moldenke .

Web links

Commons : Fallopia baldschuanica  - album with pictures, videos and audio files

Individual evidence

  1. Fallopia at Spektrum.de, accessed on October 19, 2019.
  2. Do you know the confidence of architects? , Agricultural weekly paper Westphalia-Lippe, January 15, 2015
  3. Schlingknöterich at die-honigmacher.de, accessed on October 19, 2019.
  4. Schlingknöterich at gartendialog.de, accessed on October 19, 2019.
  5. Schlingknöterich: Climbing plant for facades, fences or balconies at gartenbista.de, accessed on October 19, 2019.
  6. Fallopia baldschuanica at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
  7. ^ A b Fallopia in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved August 11, 2017.