Nutgrass also known as nutsedge, is a perennial sedge.
It grows usually up to 20-50cm tall producing glossy dark to bright green leaves. The underside of the leaf has a prominent vein running up the leaf.
The unbranched stems are erect, smooth and triangular in cross section.
The plant flowers by producing brown to reddish brown/purplish brown narrow flattened spikelet's.
Source:
Coleman, M., Kristiansen, P., Sindel, B., Fyfe, C. 2018. Nutgrass (Cyperus rotundus): Weed management guide for Australian vegetable production. School of Environmental and Rural Science, University of New England, Armidale.
Brisbane City Council 2022, Weed Identification tool, Brisbane
City Council, accessed 26 January 2023, <https://weeds.brisbane.qld.gov.au/weeds/nutgrass
>.