|Aggressive or Under Bio-control
|Method of Transportation:
• biennial herb that grows 0.3 to 2.4 m tall
• stems smooth
• basal leaves lacking; stem leaves lance shaped in outline, deeply lobed or pinnately cut; nearly smooth, spiny margined
• flowers are reddish-purple; heads solitary and nodding at the ends of branches
Land owners and managers have long recognized the need to control invasive plants to limit their impacts. In May 2018, a new smartphone app...
Bioagents are one tool in the fight against invasive plants, and they are intensly studied before release to ensure they won't switch to...