Persicaria capitata (Buch.-Ham. ex D. Don) H. Gross
Polygonum capitatum Buch.-Ham. ex D. Don
Japanese knot weed, Japanese knotweed, knotweed, persicaria, pink-head knotweed, pinkhead knotweed, pinkhead smartweed
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).
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.
Japanese knotweed (Persicaria capitata) is regarded as an environmental weed in New South Wales.
Fact sheets are available from Department of Employment, Economic Development and Innovation (DEEDI) service centres and our Customer Service Centre (telephone 13 25 23). Check our website at www.biosecurity.qld.gov.au to ensure you have the latest version of this fact sheet. The control methods referred to in this fact sheet should be used in accordance with the restrictions (federal and state legislation, and local government laws) directly or indirectly related to each control method. These restrictions may prevent the use of one or more of the methods referred to, depending on individual circumstances. While every care is taken to ensure the accuracy of this information, DEEDI does not invite reliance upon it, nor accept responsibility for any loss or damage caused by actions based on it.
Copyright 2011. All rights reserved. The University of Queensland. Special edition of Environmental Weeds of Australia for Biosecurity Queensland.