Navua Sedge

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Cyperus aromaticus

Description

This perennial grows in thick grass-like clumps, usually 30 to 60 centimetres high, occasionally reaching 2 metres.

Stem is underground which produces shoots at regular intervals along its length and develops into a shallow root system.

Leaves are drooping, clustered at the base of the stem. Leaves are about 5 centimetres long and narrow. They are strongly aromatic when crushed.

Flower at the top of a triangular stalk. Under the white knob-like flower are 6 leaflike bracts. Three are long and 3 are short.

Seeds are brown to black and eggshaped with a hook on one end.

Habitat it thrives in hot, wet, open situations, although it will also grow in drier soils. It is found in paddocks, among improved pastures, in drains and on roadsides.

Weed characteristics it forms dense stands and this plant can be a problem in sugarcane. It is unpalatable to stock.

Dispersal seeds can be spread in animal faeces and through mud on hooves, pelts, foot wear and machinery. It can also spread vegetatively.

Declaration Details

This species is not a declared plant under Queensland legislation although it is a high priority in adjacent regions and its control is recommended.

How to act

Hand removal is effective for small infestations. Foliar spraying with a sedge-specific herbicide may be effective if conducted at the right time. Mechanical control is not an effective control method.

Refer to Weed Control Methods.

References

Related information

Navua Sedge © NQ Dry Tropics 2011
Navua Sedge © NQ Dry Tropics 2011

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