- A native to Central America, this plant grows in disturbed areas in full sunlight on heavy soils retaining above average moisture. It usually occurs as a common weed of roadsides, creek banks, cultivated headlands and rundown pastures.
- An erect aromatic robust herb with several quadrangular branching stems 60-250 cm high.
- Leaves are bright green, opposite and widely spaced on stems, up to 12 cm long, 5 cm wide, tapering at both ends, margins irregularly toothed.
- Small white flowers in compact globular heads about 1.5 cm diameter on stalks to 5 cm long in leaf axils.
- Fruit is a 4-lobed capsule divided into 4 seed-like nutlets, which when ripe, rattle when the plant is shaken.
Other weed identifiers
Plant Life Cycle
Currently not declared however under the Biosecurity Act 2014 you still have an obligation to prevent or minimise a biosecurity risk posed by a pest.