Bunchy Sedge

Bunchy Sedge.

Common name

Bunchy Sedge

Scientific Name

Cyperus polystachyos

Type of plant

Grasses (Family Poaceae)

About this weed

This short, perennial grass-like sedge is originally from eastern Australia. It’s history of how it came to Western Australia is not recorded.


It is a rhizomatous, perennial or annual, grass-like herb (sedge) and grows to about 0.6 m high. The flowers are green-brown and flowering is between December and July. Reproduction is by seed and it is dispersed by water and soil.

Impact on Bushland

Bunchy Sedge can form extensive rhizomatous patches in over-watered lawns and garden beds as well as in disturbed wetlands.


It can be found in damper areas on the Swan Coastal Plain and as far north as Kununurra and prefers white or wet black sand.

Priority for removal


Management (hand)

Manual weeding throughout the year is recommended.

Management (herbicide)

For extensive patches, herbicides could be considered but check Florabase for the latest method of management before considering this alternative. Try 1% Glyphosate + Pulse®. Read the manufacturers’ labels and material safety data sheets before using herbicides. Optimal months to spray are November and December but spraying can also be done occasionally between January and July.

Information source


Additional information


ussey, B.M.J., Keighery, G.J., Dodd, J., Lloyd, S.G. and Cousens, R.D. (2007) Western weeds. A guide to the weeds of Western Australia, Second Edition, The Weeds Society of Western Australia, Victoria Park, Western Australia.

Bunchy Sedge images


Donations and support from the wider community help us to protect and campaign for our Urban Bushland.

Make a donation

newsletter Signup

Get the latest news and key events delivered to your inbox.

Become a Member

We are a peak environmental group in WA. One of our key strengths is our amazing group and individual members.

Become member

Urban Bushland Council WA Inc

2 Delhi Street West Perth WA 6005

PO Box 326 West Perth WA 6872

(08) 9420 7207 (please leave a message)