Click on images to enlarge
mass garden planting (Photo: Sheldon Navie)
habit prior to flowering (Photo: Sheldon Navie)
habit in flower (Photo: Sheldon Navie)
close-up of stems and lower leaves (Photo: Sheldon Navie)
close-up of upper leaves and flower clusters (Photo: Sheldon Navie)
Mentha pulegium L.
Labiatae (South Australia)Lamiaceae (Queensland, New South Wales, the ACT, Victoria, Tasmania, Western Australia and the Northern Territory)
European pennyroyal, mint pennyroyal, penny royal, pennymint, penny-royal, pennyroyal, pennyroyal mint, pudding grass
Native to northern Africa (i.e. northern Algeria, Egypt, northern Libya, Morocco and Tunisia), the Azores, the Madeira Islands, the Canary Islands, most of Europe and western Asia.
Widely naturalised in the temperate regions of southern Australia (i.e. in many parts of southern and eastern New South Wales, the ACT, Victoria, Tasmania, the southern parts of South Australia and south-western Western Australia).
Also naturalised overseas in New Zealand, the USA, Hawaii and southern South America.
Pennyroyal (Mentha pulegium) is regarded as an environmental weed in Victoria and Western Australia, and as a minor environmental weed or potential environmental weed in South Australia and New South Wales. This species has escaped cultivation as a garden herb and invaded grasslands, alluvial plains and wetter habitats (e.g. riparian areas and freshwater wetlands) in southern Australia.
Pennyroyal (Mentha pulegium) poses a serious threat to one or more vegetation formations in Victoria. For example, it is common and highly invasive in plains riparian shrubby woodlands, highland wetlands and plains grassy wetlands in this state. It appears on several local and regional environmental weed lists in Victoria (e.g. in Knox city, the Goulburn Broken Catchment and the Angahook-Otways region) and has been recorded in conservation areas in Victoria (e.g. Morwell National Park) and South Australia (i.e. Hale Conservation Park, Kaiserstuhl Conservation Park, Kangaroo Flat Native Forest Reserve and Para Wirra Recreation Park).
In south-western Western Australia, pennyroyal (Mentha pulegium) grows on winter-wet flats, along creeklines, and in swamps and is particularly abundant in poorly drained pastures along the south coast. It is also a weed of damp areas, depressions, riverbeds and riparian areas in New South Wales.
In other parts of the world, pennyroyal (Mentha pulegium) is reported to form dense stands that crowd out native vegetation and reduce species richness. It is considered to be moderately invasive in wetlands in California, in south-western USA, and the flora of vernal pools in this region is thought to have been particularly impacted by the loss of habitat through the introduction of pennyroyal (Mentha pulegium).
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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