Upright, annual or biennial herb < 1 m tall. Taproot is shallow. Stems arise from rosette and are woody, initially single and then branching. Leaves are glossy, dark green and spiny. Flowers are yellow with purplish veins and bear a bract of prickles below. Achenes bear pappus.
To help protect our environment:
Pasture, wasteland, open or disturbed sites.
Seeds dispersed by gravity, wind and attachment to livestock.
Competes with desirable pasture species, impedes stock movement and injures grazing animals. Unpalatable to stock. Competes with crops and impedes harvesting equipment. Likely to be a reservoir of crop pathogens.
Maintaining good pasture cover can prevent establishment or suppress an infestation. Prevent overgrazing especially in summer. Other herbicides are available for selective use in pasture.
CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.