Polygonum occurs as genus in the buckwheat family Polygonaceae. A title is probably from either a Greek poly, "many" & gonu, "knot". There exists a 2nd theory which states that a second section of the title is from either Greek gonos, "children". Most common list include knotweed, paspalum distichum, bistort & many others.

Polygonum japonicum fall foliage A genus primarily grows around northern temperate regions. It change widely from either prostrate herbaceous annual plants under 5 cm high, others erect herbaceous perennial plants growing to 3-Four m tall, & eventually others perennial woody vines growing to 20-30 m high in trees; several come when well aquatic, growing as swimming plants inside ponds. A smooth-edged leaves vary greatly in shape between coinage, & may be narrow lancelike, ellipse, broad triangular, heart molded or even arrowhead molded; it range from either One-30 cm hanker. A stems come typically crimson or even red-speckled. A flowers are little, pinkish, whiten, or even even green, forming withwithin summertime in heavy bunch from either a leaf joints or stem apices.

Numbers of knotweed mintage, particularly Japanese, Giant and Himalayan knotweed are considered noxious, invasive pests. Prefer numbers of such weeds, Japanese knotweed was introduced from either Japan first into the U.K., then into North America in the 19th century as an ornamental plant. Recently, a Japanese knotweed & others stand been utilized to exploit their high concentrations of trans-resveratrol in the plants' stalks. Antecedently associated by having & identified primarily around the skins of red grapes, resveratrol is presently under survey in the total of scientific research investigating its reputedly right antiaging properties.

Occasionally knotweeds develop pleasantly quickly when you took a spring; Giant knotweed might email Foursome.Fin m by summertime, Japanese knotweed Ternion m, & 'dwarf' Himalayan knotweed I.Five-Two m. Inside Japan, Japanese knotweed is called itadori, or even 'hard plant'. A select few metal money could spread apace from either an extensive network of rhizomes (roots that can sprout) spreading from either either 7-20 m from a parent plant & at least Two m deep. Root & stem fragments when microscopic when Ace cm may form freshly plant colonies. Floods & high a river cases do altogether or even unfair plants into lakes & lakes, dispersing pieces of knotweed throughout a awash metropolitan area & banks, which produce to recently plants. When sustaining more invasive coinage of plants, freshly disturbed soil allows a apace growing immature knotweed plants to outgrow more plants & choose above the region, suppressing more mintage. Cutting, mowing, excavation & a select few herbicide treatments, especially in early to mid growing year, fail to curb knotweed incubation & in point of fact typically cause a production of shoots from either latent buds dispersed on the root crown or even rootstalk.

Between 150-300 coinage come recognised based on the circumscription of the genus; occasionally botanists divide the genus higher into many little genera. Selected mintage include: Polygonum achoreum Polygonum acuminata Polygonum acuminatum Polygonum affine (Persicaria affinis) Polygonum alatum (Persicaria alata) Polygonum alpinum - Alpine Knotweed Polygonum amphibium - Amphibious Bistort (Persicaria amphibia) Polygonum amplexicaule (Persicaria amplexicaulis) Polygonum arenarium Polygonum arenastrum - Small-leaved Knotgrass Polygonum argyrocoleon Polygonum arifolium Polygonum aubertii - Russian Vine (Fallopia aubertii) Polygonum aviculare - Common Knotgrass Polygonum baldschuanicum (Fallopia baldschuanica) Polygonum bellardii Polygonum bidwelliae Polygonum bistorta - Bistort (Persicaria bistorta) Polygonum bistortoides Polygonum bolanderi Polygonum boreale Polygonum brasiliensis Polygonum bungeanum Polygonum buxiforme Polygonum caespitosum Polygonum californicum - California Knotweed Polygonum campanulatum - Lesser Knotweed (Persicaria campanulata) Polygonum capitatum (Persicaria capitata) Polygonum careyi Polygonum cascadense Polygonum caurianum Polygonum chinense Polygonum cilinode Polygonum coccineum Polygonum cognatum Polygonum convolvulus - Wild Buckwheat or Black Bindweed (Fallopia convolvulus) Polygonum davisiae Polygonum densiflorum Polygonum dibotrys Polygonum douglasii - Douglas' Knotweed Polygonum dumetorum - Copse Bindweed (Fallopia dumetorum) Polygonum emodi Polygonum erectum Polygonum fagopyrum - Buckwheat (Fagopyrum esculentum) Polygonum foliosum Polygonum fowleri Polygonum franktonii Polygonum glaucum Polygonum griffithii Polygonum herniarioides Polygonum heterosepalum - Dwarf Desert Knotweed Polygonum hickmanii Polygonum hirsutum Polygonum hudsonianum Polygonum hydropiper - Water-pepper Polygonum hydropiperoides Polygonum japonicum - Japanese knotweed (Reynoutria japonica) Polygonum lacerum Polygonum lanigerum ''Polygonum lapathifolium' - Pale Persicaria Polygonum leptocarpum Polygonum macrophyllum Polygonum marinense Polygonum maritimum - Sea Knotgrass Polygonum meisneranum Polygonum meisnerianum Polygonum milletii Polygonum minimum - Broadleaf Knotweed Polygonum minus - Small Water-pepper Polygonum mite - Tasteless Water-pepper Polygonum molle Polygonum multiflorum Polygonum nepalense Polygonum odoratum - Vietnamese Coriander (Persicaria odorata) Polygonum orientale (Persicaria orientalis) Polygonum oxyspermum - Ray's Knotgrass Polygonum paronychia Polygonum paronychioides Polygonum parryi Polygonum patulum Polygonum pensylvanicum Polygonum perfoliatum - Mile-a-minute weed Polygonum persicaria - Redshank or Persicaria Polygonum phytolaccifolium Polygonum plebeium Polygonum polycnemoides Polygonum polycnenoides Polygonum polygaloides Polygonum polystachyum - Himalayan knotweed (Persicaria polystachya) Polygonum punctatum Polygonum raii Polygonum ramosissimum Polygonum robustius Polygonum rurivagum Polygonum sachalinense - Giant knotweed (Reynoutria sachalinensis) Polygonum sagittatum Polygonum salicifolium Polygonum scandens Polygonum scoparium Polygonum segetum Polygonum setaceum Polygonum shastense Polygonum striatulum Polygonum tenue Polygonum tenuicaule Polygonum tinctorum Polygonum vaccinifolium (Persicaria vaccinifolia) Polygonum virginianum (Persicaria virginiana) Polygonum viviparum - Alpine Bistort Polygonum weyrichii (Persicaria weyrichii)

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