Reynoutria multiflora

Reynoutria multiflora (syn. Fallopia multiflora and Polygonum multiflorum) is a species of flowering plant in the buckwheat family Polygonaceae[1] native to central and southern China.[2][3] It is known by the English common names tuber fleeceflower[4] and Chinese (climbing) knotweed. It is known as he shou wu in China and East Asia.[5] Another name for the species is fo-ti,[6][7][8] which is a misnomer.[9]

Reynoutria multiflora
Chinese knotweed
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Reynoutria
Species:
R. multiflora
Binomial name
Reynoutria multiflora
(Thunb.) Moldenke[1]
Synonyms[1]
  • Aconogonon hypoleucum (Ohwi) Soják
  • Bilderdykia multiflora (Thunb.) Roberty & Vautier
  • Fagopyrum multiflorum (Thunb.) Grint.
  • Fallopia multiflora (Thunb.) Haraldson
  • Helxine multiflorum (Thunb.) Raf.
  • Pleuropterus cordatus Turcz.
  • Pleuropterus multiflorus (Thunb.) Turcz. ex Nakai
  • Polygonum multiflorum Thunb.

It can be difficult to prevent the spread of this vining plant and to remove it once established. The leaves are thin and fragile but the stems, although narrow in diameter, can be very strong.

Description

Reynoutria multiflora is a herbaceous perennial vine growing to 2–4 m (6 ft 7 in – 13 ft 1 in) tall from a woody tuber. The leaves are 3–7 cm (1.2–2.8 in) long and 2–5 cm (0.79–1.97 in) broad, broad arrowhead-shaped, with an entire margin. The flowers are 6–7 mm (0.24–0.28 in) diameter, white or greenish-white, produced on short, dense panicles up to 10–20 cm (3.9–7.9 in) long in summer to mid autumn. The fruit is an achene 2.5–3 mm (0.098–0.118 in) long.[2]

Traditional medicine

Reynoutria multiflora is listed in the Chinese Pharmacopoeia and is one of the most popular perennial traditional Chinese medicines. Caution must be taken, however, as overconsumption can lead to toxicity-induced hepatitis.[10]

Chemistry

More than 100 chemical compounds have been isolated from Reynoutria multiflora, and the major components have been determined to be stilbenes, quinones, flavonoids, and others. Its extract contains a stilbene glycoside.[11] [12]

See also

References
  1. "Reynoutria multiflora (Thunb.) Moldenke", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2019-02-25
  2. "Fallopia multiflora". Flora of China.
  3. "Reynoutria multiflora". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 21 December 2017.
  4. USDA, NRCS (n.d.). "Polygonum multiflorum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 12 October 2015.
  5. Bounda, G. A; Feng, Y (2015). "Review of clinical studies of Polygonum multiflorum Thunb. And its isolated bioactive compounds". Pharmacognosy Research. 7 (3): 225–236. doi:10.4103/0974-8490.157957. PMC 4471648. PMID 26130933.
  6. "Fo-ti". WebMD.
  7. Lin, Longfei; Ni, Boran; Lin, Hongmei; Zhang, Miao; etc. (15 January 2015). "Traditional usages, botany, phytochemistry, pharmacology and toxicology of Polygonum multiflorum Thunb.: A review". Journal of Ethnopharmacology. 159: 158–183. doi:10.1016/j.jep.2014.11.009. PMC 7127521. PMID 25449462.
  8. "Polygonum multiflorum and liver reactions". MHRA. 2006. Archived from the original on 2014-12-05.
  9. "He-shou-wu (Polygonum multiflorum) potted plant, organic". Strictly Medicinal Seeds. 2016-11-22. Retrieved 2021-03-31.
  10. Jung, KA; Min, HJ; Yoo, SS; Kim, HJ; Choi, SN; Ha, CY; Kim, HJ; Kim, TH; et al. (2011). "Drug-Induced Liver Injury: Twenty Five Cases of Acute Hepatitis Following Ingestion of Polygonum multiflorum Thunb". Gut and Liver. 5 (4): 493–9. doi:10.5009/gnl.2011.5.4.493. PMC 3240794. PMID 22195249.
  11. Tang, J (2007). "Antioxidant activity of stilbene glycoside from Polygonum multiflorum Thunb in vivo". Food Chemistry. 104 (4): 1678–1681. doi:10.1016/j.foodchem.2007.03.022.
  12. Grech J. N. , Li Q. , Roufogalis B.D., Duke C.C. Novel Ca2+-ATPase Inhibitors from the Dried Root Tubers of Polygonum multiflorum. J Nat Prod-Lloyda 57(12), 1682-1687, 1994.
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