ACT NSW ACT Government :: Queanbeyan-Palerang Regional Council :: Australian Native Plants Society (ANPS) Canberra Region :: Gearys Gap/Wamboin Landcare Group
Home Plants Grasses Hyparrhenia hirta

Hyparrhenia hirta

Coolatai Grass

General biosecurity duty NSW with additional restrictions in the South East regiin.

https://www.environment.act.gov.au/__data/assets/pdf_file/0010/1144486/Coolatai-Grassv103.11.17.pdf

http://weeds.dpi.nsw.gov.au/Weeds/Details/179

Coolatai grass was recently found along Brindabella road and we need your help to find any further outbreaks. Cooatai is a drought, herbicide and fire tolerant tussock grass from Africa. It is a major weed in northern NSW and it is capable of smoothering the understorey of our regions woodlands and grasslands.   It's most recognisible feature are its paired seed spikelets, where one spike has a stalk and the other is stalkless.

Coolatai grass is a long lived summer active perennial that produces short rhizomes that forms a dense grass tussocks and grows to 1.5 m. It has greyish-green leaves that turn orangey-red in winter, particularly after frost. The leaves are harsh to touch. Leaf sheaths are usually hairless and keeled. The leaf blade is flat and 2-3 mm wide with the ligule 2-3 mm long and minutely toothed.

The seedhead is a ‘false panicle’ consisting of paired racemes with 5-8 awns per raceme. The paired racemes are up to 35 mm long and arise from 3-8 cm long flower bracts. Half the flowers are male and therefore sterile.

Page 1 of 1 - image sightings only 4 0 4

Hyparrhenia hirta (Coolatai Grass) at Kaleen, ACT - 20 Sep 2020 by Parks818 Hyparrhenia hirta (Coolatai Grass) at Coree, ACT - 16 Feb 2018 by ACTParks-InvasivePlantsTeam Hyparrhenia hirta (Coolatai Grass) at Bredbo, NSW - 27 Dec 2016 by jackfrench Hyparrhenia hirta (Coolatai Grass) at Bredbo, NSW - 5 May 2016 by MichaelMulvaney
Hyparrhenia hirta (Coolatai Grass) at Kaleen, ACT - 20 Sep 2020 by Parks818
Hyparrhenia hirta (Coolatai Grass) at Coree, ACT - 16 Feb 2018 by ACTParks-InvasivePlantsTeam
Hyparrhenia hirta (Coolatai Grass) at Bredbo, NSW - 27 Dec 2016 by jackfrench
Hyparrhenia hirta (Coolatai Grass) at Bredbo, NSW - 5 May 2016 by MichaelMulvaney

View distribution

Close up of Seed-head branches
Close up of flower spikelets
Dense infestation

Species information

  • Hyparrhenia hirta Scientific name
  • Coolatai Grass Common name
  • Not Sensitive
  • Exotic
  • Noxious or High Risk Weed or Pest
  • External link More information

Location information

Follow Hyparrhenia hirta

Receive alerts when new sightings are reported

Subscribe
1269307 sightings of 7340 species in 1318 locations from 4793 members
Proudly Australian made, owned and hosted CCA 3.0 | privacy