Weed Alert: Chinese violet
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- Declared in NSW under the Noxious Weeds Act 1993 (Current Status)
- National Environmental Alert List weed (definition)
Contacts and Further InformationIf you find this weed please contact your local Council Weeds Officer or the nearest NSW Department of Primary Industries office immediately for positive identification and further assistance.
Alternatively call the NSW Weeds Hotline on
1800 680 244 or send an email to email@example.com
Chinese violet (Asystasia gangetica subspecies micrantha)
A form of Chinese Violet, Asystasia gangetica subspecies micrantha, is a major weed overseas and has begun to naturalise in Australia.
The micrantha subspecies was first recorded in NSW as naturalised at Boat Harbour, north of Newcastle, in July 1999. It is now also known from a number of nearby locations.
The commonly cultivated Chinese Violet, Asystasia gangetica subspecies gangetica, is planted widely in Australia but is less weedy. This subspecies is naturalised at Port Douglas in Queensland, and in the Northern Territory at Bartalumba Bay and Groote Eylandt.
All subspecies of Asystasia gangetica have been added to the list of prohibited imports and can no longer be brought into Australia.
Asystasia gangetica subspecies micrantha is a rapidly growing perennial herb that grows to 1m high, but can grow over shrubs up to 3m tall. It can smother all vegetation in the herbaceous layer . This weed grows in tropical and subtropical areas.
Asystasia gangetica subspecies micrantha grows in mats similar to those formed by Wandering Jew, Tradescantia fluminensis.
Leaves and stems
Leaves and stems have scattered hairs. Leaves are paler below.
20–25mm long, white outside and inside with some purple blotches in two parallel lines inside.
30–31mm long, guitar shaped (with neck of guitar attached to stem) and containing fourflattened seeds held in place by conspicuous hooks.
Plants spread by seed and/or rhizomes. The seeds are dispersed explosively from drying capsules but long distance dispersal is generally by man. Stems root at each node.
Seedlings can be removed by hand and bagged for disposal ensuring no rhizomes are left as these can develop into new infestations.
For herbicide control, contact your Council Weeds Officer or NSW Department of Primary Industries office.
Asystasia gangetica subspecies micrantha is a Class 1 noxious weed throughout NSW under the NSW Noxious Weeds Act 1993. This weed must be eradicated from the land and the land must be kept free of the plant. As a notifiable weed, all outbreaks must be reported to the local council.
Authors: P. Gorham, J. Hosking, NSW Department of Primary Industries