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National Invasive Species Information Center
U.S. Department of Agriculture
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  2. Terrestrial Invasives
  3. Terrestrial Plants
  4. Diffuse Knapweed

Diffuse Knapweed

Scientific Name

Centaurea diffusa Lam. (ITIS)

Common Name

Diffuse knapweed, white knapweed, spreading knapweed, tumble knapweed

Synonym

Acosta diffusa (Lam.) (ITIS)

Native To

Eastern Mediterranean region (Winston et al. 2012)

Date of U.S. Introduction

1800s (Wolfson et al. 2005)

Means of Introduction

Introduced accidentally through contaminated seed (Zouhar 2001)

Impact

Reduces agricultural yields and forage values; crowds out native species (Winston et al. 2012)

Diffuse knapweed

Diffuse knapweed, flowers

Credit

USDA APHIS PPQ, Oxford, North Carolina

Source
Invasive.org.

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