Powered by the Centre for Invasive Species Solutions
Plant Form: Erect perennial herb.
Size: Up to 2 m tall.
Stem: Finely hairy.
Leaves: Alternate along stem, deeply twice-divided, greyish, finely hairy, up to 16 cm long.
Flowers: Small greenish flowerheads up to 4 mm across, often drooping, in large clusters at the end of stems.
Fruit and Seeds: Burrs with short, hooked spines, about 4 mm long.
Habitat: Roadsides, wasteland, pastures, cropland.
Distinguishing Features: The hooked spines on the fruit are unique among Ragweeds (Ambrosia species) introduced to Australia.