Serrated tussock
Alert
Be on the lookout for serrated tussock and report any sightings immediately.
Reporting options
- Report online.
- Phone Biosecurity Queensland on 13 25 23.
- Phone the Exotic Plant Pest Hotline on 1800 084 881.
Serrated tussock plant form
© Natasha Baldyga
Serrated tussock infestation
© Aaron Simmons
Serrated tussock showing purple seed heads
© Simon Bonwick
Native to South America, serrated tussock grass invades pasture and open woodlands and reduces land productivity. In Australia, it is found mainly on the tablelands of New South Wales and the Australian Capital Territory, and in several locations in Victoria and Tasmania. It is one of the worst weeds in New South Wales.
Serrated tussock grass has not yet been found in Queensland and is a prohibited invasive plant under the Biosecurity Act 2014.
Scientific name
Other names
- Nassella tussock
Similar species
Description
- Serrated tussock grass grows to 30cm tall.
- Leaves are thin, tightly rolled, pale, yellow-green and hairless. They have very fine serrations.
- Leaf bases are white and swollen.
- Ligules (small flaps about 1mm long that protrude where leaves separate from the stem) are white and hairless.
- Flower heads have a purple tinge when young and turn golden as seeds ripen. They weep and then break off at maturity.
3D model
View the 3D model to help you identify this plant. You can magnify the image and manipulate the view to inspect the plant from every angle.
Habitat
- Mostly confined to cooler temperate areas of Australia.
- Grows in all soil types but rarely found on swampy land.
- Found in pastures, grassland and disturbed areas, and along roadsides.
Distribution
- Not known to occur in Queensland.
- Distribution appears to be limited by hot summers.
Life cycle
- Is a long-lived perennial plant.
- Seeds may live in the soil for more than 10 years but most die rapidly.
- Germinates mainly in autumn, but may germinate at any time of year.
- Seedlings are weak and slow-growing.
- Plants may be several years old before flowering.
- Seeds set in summer.
- Plants grow little in winter.
Impacts
Environmental
- Reduces biodiversity.
Economic
- Invades pastures and open woodlands.
- Reduces land productivity.
How it is spread
- Spread mainly by seeds adhering to animals and clothing.
- Also spread by machinery, especially slashers.
Prevention
Control
- Before undertaking any preventative or control actions, contact us online, by phone or in person.
Biological control
- No known biological control agents.
Legal requirements
- Serrated tussock is a prohibited invasive plant under the Biosecurity Act 2014.
- You must not:
- keep it
- move it
- give it away
- sell it
- release it into the environment
If you do any of these, penalties may apply.
- You must not take any action that is reasonably likely to exacerbate the biosecurity threat posed by serrated tussock.
- You must take any action that is reasonably likely to minimise the biosecurity threat posed by serrated tussock.
- You must report any sightings immediately using 1 of the following methods:
- Report online.
- Phone Biosecurity Queensland on 13 25 23.
- Phone the Exotic Plant Pest Hotline on 1800 084 881.
Further information
- Contact us online, by phone or in person.
- Compare serrated tussock with Mexican feather grass.
- Read more about serrated tussock.
- View the serrated tussock 3D model.