What’s the Difference Between Spotted, Brown, Black, and Meadow Knapweed?

What’s the Difference Between Spotted, Brown, Black, and Meadow Knapweed?

Twenty two different knapweed (Centaurea sp) species are well established in the United States. Four of these knapweed overlap in distribution and share similar morphological characteristics. This includes spotted (C. stoebe), brown (C. jacea), black (C. nigra) and meadow knapweed (C. xmoncktonii). The key to separating these and other knapweed species are the involucre bracts.

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Identification and Management of Brown, Black, and Meadow Knapweed

Identification and Management of Brown, Black, and Meadow Knapweed

Twenty two different knapweed species (Centaurea sp) are well established in North America. Most are introduced opportunists that have aggressively invaded natural areas, pastures, open woodlands, rights-of-way, and disturbed areas. Brown (C. jacea), black (C. nigra) and meadow knapweed (C. ×moncktonii) are long-lived perennial plants that are problematic in the United States and southern Canada.

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