Koenigia weyrichii

Koenigia weyrichii (synonym Persicaria weyrichii),^[1] the Chinese knotweed^[2] or Weyrich's knotweed, is a large, perennial, rhizomatous herb native to northeastern Asia in Kamchatka, Sakhalin, and northern and central Japan.^[1] It is also locally naturalised in northern Europe.

Clade:Embryophytes

Clade:Tracheophytes

Clade:Angiosperms

Clade:Eudicots

Quick facts Scientific classification, Binomial name ...

Koenigia weyrichii
Koenigia weyrichii on Mount Nasu, Tochigi prefecture, Japan
Scientific classification
Kingdom:	Plantae
Clade:	Embryophytes
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Polygonaceae
Genus:	Koenigia
Species:	K. weyrichii
Binomial name
Koenigia weyrichii (F.Schmidt) T.M.Schust. & Reveal[1]
Synonyms[1]
Aconogonon pseudoajanense Barkalov & Vyschin Aconogonon savatieri (Nakai) Tzvelev Aconogonon savatieri var. iturupense (Mishurov) Tzvelev Aconogonon weyrichii (F.Schmidt) H.Hara Aconogonon weyrichii subsp. savatieri (Nakai) Tzvelev Persicaria weyrichii (F.Schmidt) H.Gross Pleuropteropyrum iturupense (Mishurov) Soják Pleuropteropyrum savatieri (Nakai) Koidz. ex Nakai Pleuropteropyrum weyrichii (F.Schmidt) H.Gross Polygonum iturupense Mishurov Polygonum weyrichii F.Schmidt Reynoutria weyrichii (F.Schmidt) Moldenke

Close

It is one of the parents of the cultivated hybrid Koenigia × fennica, the other being Koenigia alpina.^[3][4]