Non-native thistles

Carduus nutans
Cirsium arvense
Cirsium vulgare

Non-native “thistles”include spotted knapweed (Centaurea stoebe ssp. micranthus), musk thistle (Carduus nutans), Canada thistle (Cirsium arvense), bull thistle (Cirsium vulgare), and Scotch thistle (Onopordum acanthium ssp. acanthium), with the first two species being the most widespread in Missouri.

Identification and fact sheets


Representative photos of Non-Native thistles:

Photos by Gerald Holmes, Strawberry Center, Cal Poly San Luis Obispo,

Non-Native thistles impact, abundance, and trend in Missouri


 Learn more about the Missouri Invasive Plant Assessment →