Erect perennial grass 0.5 -2metres in height, with glaborous to downey nodes. Leaves are alternately arranged smooth to 50cm long with a very pronounced mid-vein
Widely naturalised, particularly in the wetter parts of mainland Australia. It is most prominent in the coastal and sub-coastal regions of New South Wales and in south-eastern Queensland. Relatively common in Victoria, the ACT, south-eastern South Australia and south-western Western Australia. It also has a scattered distribution in other parts of these states. Widely naturalised overseas, including in North America (i.e. southern Canada, the USA and Mexico), Central America, South America, south-eastern Asia (i.e. the Philippines, Thailand, Indonesia and Papua New Guinea), New Zealand and on numerous Pacific islands (e.g. Fiji, French Polynesia, Guam, Hawaii, New Caledonia, Palau and Tonga).
A weed of disturbance Johnson grass rtypically establishes in damp to wet areas along roadsides and in disturbance zones. Heavily associated with peri-urban release lands
Rhizomatous, tufted perennial, grass-like or herb, 0.5-2 m high
When removed from grazing pressure this grass, grows and spreads quite rapidly outcompteteing native vegetation . Can be a fire hazard during dry periods
Leaves are alternately arranged smooth to 50cm long with a very pronounced mid-vein and rough margins.
Reproduces both sexually and asexually. Dispersing through dehicsing seeds that are spread by wind; water; animals and birds. Seeds are viable for 20+ years.