Click on images to enlarge
infestation (Photo: Sheldon Navie)
habit (Photo: Sheldon Navie)
habit (Photo: Sheldon Navie)
basal rosette of leaves (Photo: Sheldon Navie)
the relatively large, deeply-lobed, lower leaves (Photo: Sheldon Navie)
smaller, stem-clasping, upper leaves (Photo: Sheldon Navie)
old flower-heads and mature fruit with fluffy seeds (Photo: Sheldon Navie)
close-up of fluffy seeds (Photo: Sheldon Navie)
close-up of seeds, with their hairs removed (Photo: Steve Hurst at USDA PLANTS Database)
young seedling (Photo: Sheldon Navie)
young plant (Photo: Sheldon Navie)
close-up of yellow flower-head with numerous small 'petals' (Photo: Sheldon Navie)
Sonchus oleraceus L.
Sonchus tenerrimus L. (misapplied)
Asteraceae (Queensland, New South Wales, the ACT, Victoria, Tasmania, Western Australia and the Northern Territory)Compositae (South Australia)
annual milk thistle, annual sow thistle, annual sowthistle, colewort, common sow thistle, common sow-thistle, common sowthistle, field sow-thistle, hare's lettuce, hare's-lettuce, milk-thistle, milk thistle, small sow thistle, smooth sow-thistle, smooth sowthistle, sow thistle, sow-thistle, sowthistle
Native to northern Africa (i.e. Algeria, Egypt, Libya, Morocco and Tunisia), Europe, western and northern Asia (i.e. Afghanistan, Iran, Iraq, Jordan, Lebanon, Syria, Turkey, Armenia, Azerbaijan, Georgia, Russia, Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, northern and central China and Korea) and the Indian Sub-continent (i.e. northern India, Nepal and northern Pakistan).
This species is very widely naturalised throughout Australia, though it is less common in the driest and northernmost parts of the country. It is found throughout Queensland, New South Wales, the ACT, Victoria, Tasmania, South Australia and Western Australia and is also naturalised in the southern and central parts of the Northern Territory). Also naturalised on Lord Howe Island, Norfolk Island and Christmas Island.
Naturalised overseas in tropical and southern Africa, New Zealand, North America (i.e. the USA, Canada and Mexico), Central America, the Caribbean, South America, Mauritius, south-eastern Asia (i.e. Vietnam, the Philippines, Taiwan and Papua New Guinea) and on several Pacific islands (i.e. the Galápagos Islands, Fiji, French Polynesia, Guam, Hawaii, Kiribati, the Marshall Islands, New Caledonia, Niue and Tonga).
Common sowthistle (Sonchus oleraceus) is regarded as an environmental weed in Victoria, Western Australia, South Australia, New South Wales, Queensland, Tasmania and the Northern Territory.
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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