Cyperus rotundus, Fam. Cyperaceae
Perennial sedge to 40cm tall, stems rigid 3-angled, 1-2mm thick, with tuberous base; underground runners forming dark reddish-brown to black tubers, commonly referred to as ‘nuts’.
Other invasive plants
Invasive plants that are not prohibited or restricted invasive plants, but are known to spread readily and cause negative impacts, within the region.
|Form or habit:||Sedges, Rushes and allies|
Simple, basal, bright green clustered at ground level, 75-125 x 2-6mm, tapered to a fine point.
|Flower description:||Consist of 2-4 green leaf-like bracts and 4-5 branches of varying length, all arising at the top of a single thin triangular stem. Each branch carries a cluster of flattened rich red-brown spikelets, 10-25 x 2-2.5mm.|
|Fruit description:||This species seldom produces mature ‘seeds’.|
|Food source for:|
|Toxicity:||No toxicity known|
|Notes:||Spread by: ‘nuts’ (tubers) in contaminated soil and garden waste. Invades/threats: cultivated soil and damp pastures; gardens and lawns. Can infest large areas. Notes: difficult to eradicate because ‘nuts’ can lie dormant in the soil. Environmental weed.|
|Information sources:||Mackay Regional Pest Management Group (2018) Weeds of the Mackay Whitsunday Region Second Edition.|