Weed Identification >
Nutgrass
Common Name
Nutgrass
Scientific Name
Cyperus rotundus
Family
Cyperaceae
Lifecycle
Evergreen
Seasons of Growth
All year round
Key Distinguishing Feature
Reddish-purple colour of the flower spikelets is the easiest way of differentiating nutgrass from False Onion Weed.
A long-lived grass-like plant usually growing 20-50 cm tall. It produces a network of creeping underground stems with small tubers (10-25 mm long). Its upright flowering stems are smooth and three-angled in cross-section its very narrow leaves.
Its seed-heads have 3-8 branches of varying in length (up to 10 cm long) and are subtended by two to four green leafy bracts. These branches bear several elongated reddish-brown or purplish-brown flower spikelets.
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