Oriental knotweed
| Oriental knotweed | ||||||||||||
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Oriental knotweed ( Persicaria orientalis ) |
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| Systematics | ||||||||||||
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| Persicaria orientalis | ||||||||||||
| ( L. ) Spach |
The oriental knotweed ( Persicaria orientalis ) is a species of the knotweed family (Polygonaceae).
features
The oriental knotweed is an annual plant that reaches heights of 50 to 150, rarely up to 300 centimeters. The stem is erect. The leaf blades reach a length of 8 to 20 centimeters, the petioles from 2.5 to 10 centimeters. The upper edge of the stipule sheath is lobed. The inflorescence is nodding and pseudo-eared.
The flowering period extends from July to October.
The number of chromosomes is 2n = 22.
Occurrence
The oriental knotweed occurs in East and Southeast Asia on rice fields and in swamps. Its original range extends from Iran to China, Japan and Taiwan and also includes India, Bangladesh, Bhutan, Sri Lanka, Myanmar, Thailand, Vietnam, Indonesia, Malaysia, the Philippines and Australia.
use
The oriental knotweed is rarely used as an ornamental plant for summer flower beds. The species has been in culture since at least 1700.
literature
- Eckehart J. Jäger, Friedrich Ebel, Peter Hanelt, Gerd K. Müller (eds.): Rothmaler - excursion flora from Germany. Volume 5: Herbaceous ornamental and useful plants . Spectrum Academic Publishing House, Berlin Heidelberg 2008, ISBN 978-3-8274-0918-8 , p. 210 .
Individual evidence
- ↑ https://www.ipni.org/n/60455314-2
- ^ Polygonum orientale at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ Persicaria in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved August 14, 2017.
