Content tagged with "Spotted Knapweed"

Controlling the scourge of invasive spotted knapweed

This content is archived
Spotted Knapweed Flower
Invasive species, such as spotted knapweed, are a top threat to Missouri’s native plants and animals. More

Don’t lose ground to invasive spotted knapweed

This content is archived
Photo of spotted knapweed flower head showing spots on involucral bracts
More

News and Events

This content is archived
"News and Events" for the February 2010 Missouri Conservationist. More

Spotted Knapweed

Photo of spotted knapweed flower head showing spots on involucral bracts
Centaurea stoebe
Spotted knapweed is an invasive plant that outcompetes native communities, takes over pastureland, and even beats back invasive sericea lespedeza! It has arrived in our state. Let’s prevent its spread. More

Spotted Knapweed (Flower)

Photo of spotted knapweed flower head showing spots on involucral bracts
The black, arrow-shaped spot on each bract gives spotted knapweed its common name. More

Spotted Knapweed (Leaves)

Photo of spotted knapweed plant showing foliage and growth habit
A single spotted knapweed plant can have a single stem or as many as 20 stems. It usually flowers in the second year, producing branched stems. The leaves are alternate, deeply lobed, and pale blue-gray. More

Spotted Knapweed Flower

Spotted Knapweed Flower
One of Missouri's most harmful invasive plant species is spotted knapweed. More

Spotted Knapweed Leaves

Spotted Knapweed Leaves
One of Missouri's most harmful invasive plant species is spotted knapweed. More

Spotted Knapweed Plant

Spotted Knapweed Plant
One of Missouri’s most harmful invasive plant species is spotted knapweed. More

Spotted Knapweed Rosette

Photo of spotted knapweed rosette, formed in the first year of growth
By the end of its first year, a knapweed plant is a small basal rosette. It usually bolts in the second year, producing branched stems. More