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habit (Photo: Sheldon Navie)
habit (Photo: Sheldon Navie)
older stem (Photo: Sheldon Navie)
leaves and flowers (Photo: Sheldon Navie)
whitish-coloured new growth (Photo: Sheldon Navie)
close-up of flowers (Photo: Sheldon Navie)
mature fruit with seeds (Photo: Sheldon Navie)
Pittosporum crassifolium Banks & Sol. ex A. Cunn.
dwarf karo, karo, karo pittosporum, stiff-leaf cheesewood, stiffleaf cheesewood, thick leaved box
Native to New Zealand (i.e. the North Island of New Zealand and the Kermadec Islands).
Naturalised in south-eastern Australia (i.e. in southern Victoria and the coastal districts of central New South Wales). Also sparingly naturalised in south-eastern South Australia and naturalised on Norfolk Island.
Naturalised overseas in south-western USA (i.e. California).
Karo (Pittosporum crassifolium) is regarded as an environmental weed in Victoria and New South Wales, and as a "sleeper weed" in other parts of southern Australia. This species is cultivated as a garden ornamental in wetter temperate regions, where it is often grown as a hedging plant. Its fruit are eaten by birds and other animals, which spread it into bushland areas.
Karo (Pittosporum crassifolium) is most important in Victoria, where it is seen as a potential threat to one or more vegetation formations. It was first recorded becoming naturalised in this state in 1984 and is now regarded as a potentially serious environmental weed. It appears on several local environmental weed lists in the southern parts of Victoria (e.g. in the Shire of Yarra Ranges, Mornington Peninsula Shire, Colac-Otway Shire and Sherbrooke Forest) and is listed as a "sleeper weed" in Frankston City.
In New South Wales, karo (Pittosporum crassifolium) is naturalised at Malabar Headland on the central coast and is listed as an environmental weed by the Blue Mountains City Council.
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 © 2016. All rights reserved. Identic Pty Ltd. Special edition of Environmental Weeds of Australia for Biosecurity Queensland.
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