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Russian Knapweed

Scientific Name

Rhaponticum repens (L.) Hidalgo (ITIS)

Common Name

Russian knapweed, Turkestan thistle, creeping knapweed, mountain bluet, Russian cornflower, hardheads


Centaurea repens (L.), Acroptilon repens (L.) DC. (ITIS)

Native To

Eurasia (Zouhar 2001)

Date of U.S. Introduction

Early 1900s (Zouhar 2001)

Means of Introduction

Accidentally as a seed contaminant (Zouhar 2001)


Crowds out native species and desirable forage; toxic to horses (Zouhar 2001)

Russian knapweed

Russian knapweed, plants


Photo by Norman E. Rees; USDA, Agricultural Research Service

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Distribution / Maps / Survey Status


Selected Resources

The section below contains highly relevant resources for this species, organized by source.

Council or Task Force
Federal Government
State and Local Government
  • Integrated Taxonomic Information System. Rhaponticum repens. [Accessed Sep 10, 2014].

  • Zouhar, K.L. 2001. Acroptilon repens. In: Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory.