Scientific Name
Persicaria capitata (Buch.-Ham. ex D. Don) H. Gross
Synonyms
Polygonum capitatum Buch.-Ham. ex D. Don
Common Names
Japanese knot weed, Japanese knotweed, knotweed, persicaria, pink-head knotweed, pinkhead knotweed, pinkhead smartweed
Family
Polygonaceae
Origin
Native to China, the Indian Sub-continent (i.e. Bhutan, northern India, Nepal and Sri Lanka) and south-eastern Asia (i.e. Myanmar, Thailand, Vietnam and Malaysia).
Naturalised Distribution
This species is becoming widely naturalised in southern and eastern Australia. It is currently naturalised in south-eastern Queensland, in the coastal and sub-coastal districts of northern and central New South Wales and in the coastal districts of south-western Western Australia. It is also sparingly naturalised in south-eastern South Australia.
Naturalised overseas in the USA (i.e. California, Oregon and Louisiana), New Zealand, La R union and Hawaii.
Notes
Japanese knotweed (Persicaria capitata) is regarded as an environmental weed in New South Wales.
