Exotic Pest Reporting
Barry Rice, sarracenia.com, Bugwood.org
Red (Purple) starthistle
Red (Purple) starthistle (Centaurea calcitrapa) is an invasive plant. It is a native of Europe and was first detected in Washington in 1989.
Centaurea species may produce allelopathic effects and are highly competitive with other plants, often displacing desired vegetation.
Summaries of State Plant Protection Laws and Regulations