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Reynoutria japonica, synonyms Fallopia japonica and Polygonum cuspidatum, is a species of herbaceous perennial plant in the knotweed and buckwheat family Polygonaceae. [1] [2] Common names include Japanese knotweed [2] and Asian knotweed. [3] It is native to East Asia in Japan, China and Korea.
Reynoutria is a genus of flowering plants in the Polygonaceae, also known as the knotweed or buckwheat family. The genus is native to eastern China, Eastern Asia and the Russian Far East , although species have been introduced to Europe and North America. [ 1 ]
Fallopia × bohemica → Reynoutria × bohemica, Bohemian knotweed. Fallopia ciliinodis (Michx.) Holub – fringed black bindweed → Polygonum ciliinode; Fallopia denticulata (C.C.Huang) Holub → Pteroxygonum denticulatum; Fallopia japonica Houtt. – Japanese knotweed → Reynoutria japonica; Fallopia sachalinensis – giant knotweed → ...
Some of these species are exotics (not native to Montana) [2] ... Reynoutria japonica (syn. Polygonum cuspidatum), Japanese knotweed; Rumex acetosa, garden sorrel;
Reynoutria sachalinensis is a herbaceous perennial plant growing to 2–4 m (79–157 in) tall, with strong, extensively spreading rhizomes forming large clonal colonies. The leaves are some of the largest in the family, up to 15–40 cm (6–15.5 in) long and 10–28 cm (4–11 in) broad, nearly heart-shaped, with a somewhat wavy, crenate margin.
Aphalara itadori, the Japanese knotweed psyllid, is a species of psyllid from Japan which feeds on Japanese knotweed (Reynoutria japonica).. The UK Government licensed the use of this species as a biological control to counter the spread of Japanese knotweed in England; this was the first time that biological control of a weed was sanctioned in the European Union.
Bohemian knotweed is a nothospecies that is a cross between Japanese knotweed and giant knotweed.It has been documented as occurring in the wild in Japan. [1] The scientific name is accepted to be Reynoutria × bohemica, [2] but it may also be referred to as Fallopia × bohemica and Polygonum × bohemicum.
Japanese knotweed (Reynoutria japonica), native to Asia, is one of the most damaging invasive alien plants in the world. [3] It became her major research focus and led to publication of a groundbreaking analysis of the history and distribution of this invasive weed in 1977. [4]