Click on images to enlarge
habit (Photo: Sheldon Navie)
strap-like leaves (Photo: Sheldon Navie)
flowers (Photo: Sheldon Navie)
white flower with purple, yellow and brown markings (Photo: Sheldon Navie)
close-up of immature fruit (Photo: Sheldon Navie)
close-up of mature fruit with seeds (Photo: Sheldon Navie)
seedlings germinating under adult plants (Photo: Sheldon Navie)
plants spreading from cultivated specimen (Photo: Sheldon Navie)
close-up of flower showing the purplish style branches and brown markings at the base of its inner 'petals' (Photo: Sheldon Navie)
close-up of immature fruit with young seeds (Photo: Sheldon Navie)
Dietes grandiflora N.E. Br.
butterfly iris, fairy iris, large wild iris, native iris, Spanish iris, wild iris
Native to southern Africa (i.e. Cape Province and Natal in South Africa).
Naturalised in south-western Western Australia and on naturalised on Lord Howe Island. Also sparingly naturalised in south-eastern Queensland.
Large wild iris (Dietes grandiflora) is regarded as an environmental weed in Western Australia and as a potential environmental weed New South Wales (particularly in the wider Sydney and Blue Mountains region). Though it is currently not very widely naturalised, it is showing invasive tendencies and is thought to pose a threat to natural habitats. For example, it has been reported to have spread from garden plantings or dumped garden waste into Jarrah-Marri forest in south-western Western Australia.
Note: this species is commonly confused with wild iris (Dietes iridioides), another emerging environmental weed.
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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