Powered by the Centre for Invasive Species Solutions
Plant Form: Biennial erect herb.
Size: Up to 1.5 m tall.
Stem: Interrupted, spiny wings along stems.
Leaves: Toothed to lobed, with spiny margins, to 30 cm long, green above and white below. Stem leaves are 4-25 cm long and stalkless, forming a wing.
Flowers: Purple, 12-40 mm diameter, with spreading to recurved spines.
Fruit and Seeds: 3-6 mm long, light brown, smooth, with parachuting hairs 2-3 cm long.
Habitat: Agricultural areas, wasteland, roadsides.
Distinguishing Features: Flowerheads wide, solitary or in small clusters whereas Perennial thistle (Cirsium arvense) flowerheads are narrow and grouped in larger clusters.