Home » Weed biosecurity » High priority weeds index » Aleman grass
On 1 July 2017, the Noxious Weeds Act 1993 was replaced by the Biosecurity Act 2015. The Weed biosecurity section of this website is being reviewed, and information currently on this page may not reflect the new legislation.
Flower heads are
Leaves are flat and
smooth, with rough
|Aleman grass grows to 1-3m high.||
Aleman grass forms
|Seed production is poor.|
Aleman grass (Echinochloa polystachya) is an aquatic or semi-aquatic perennial grass growing to between one metre and three metres high. It forms dense stands in swampy areas and along banks of watercourses and is able to grow in water up to two metres deep.
Aleman grass originates from tropical and subtropical America. It was introduced to Queensland as a ponded pasture species and now invades seasonally flooded areas, swamps, and banks of watercourses. Infestations have also occurred in the Northern Territory, Western Australia and northern NSW.
There are eight infestations of Aleman grass known on the NSW North Coast.
Predictive mapping supplied by Queensland Biosecurity