Taxon: Centaurea diffusa Lam.

 
Genus: Centaurea
Family: Asteraceae (alt.Compositae)
  Subfamily: Carduoideae
      Tribe: Cardueae
        Subtribe: Centaureinae
Nomen number: 104125
Place of publication: Encycl. 1:675. 1785
Name Verified on: 01-Mar-2012 by ARS Systematic Botanists. Last Changed: 01-Mar-2012
Species priority site is:
Accessions: 0 in National Plant Germplasm System

Common names:

  • diffuse knapweed  (Source: World Econ Pl) - English
  • small-flower star thistle  (Source: F GB Ire) - English
  • tumble knapweed  (Source: F NAmer) - English
  • white knapweed  (Source: Zander ed16) - English
  • centaurée diffuse  (Source: F NAmer) - French
  • sparrige Flockenblume  (Source: Zander ed16) - German

Economic Importance:

  • Weed: potential seed contaminant (fide Rep NCEPPC)

Distributional Range:

    Native:

  • Asia-Temperate

    • Caucasus: Armenia; Azerbaijan; Georgia; Russian Federation - Dagestan; Russian Federation-Ciscaucasia - Ciscaucasia
    • Western Asia: Turkey
  • Europe

    • Eastern Europe: Moldova; Ukraine
    • Southeastern Europe: Bulgaria; Greece; Macedonia; Romania; Serbia

  • Naturalized:

  • Asia-Temperate

    • Siberia: Russian Federation - Altay, - Krasnoyarsk
  • Europe

    • Middle Europe: Austria; Germany; Hungary; Poland; Switzerland
    • Southeastern Europe: Italy; Slovenia
    • Southwestern Europe: France; Spain
  • Northern America

    • Eastern Canada: Canada - Quebec, - Ontario
    • North-Central U.S.A.: United States - Illinois, - Iowa, - Missouri, - Nebraska
    • Northeastern U.S.A.: United States - Connecticut, - Indiana, - Massachusetts, - Michigan, - New Hampshire, - New Jersey, - Rhode Island
    • Northwestern U.S.A.: United States - Colorado, - Idaho, - Montana, - Oregon, - Washington, - Wyoming
    • South-Central U.S.A.: United States - New Mexico
    • Southeastern U.S.A.: United States - Kentucky, - Tennessee
    • Southwestern U.S.A.: United States - Arizona, - California, - Nevada, - Utah
    • Subarctic America: Canada - Yukon Territory
    • Western Canada: Canada - Saskatchewan, - Alberta, - British Columbia
  • Southern America

    • Southern South America: Argentina

  • Adventive:

  • Europe

    • Eastern Europe: Estonia; Latvia; Lithuania
    • Middle Europe: Belgium; Czech Republic; Slovakia
    • Northern Europe: Norway; United Kingdom

References:

  • Cabrera, A. L. & E. M. Zardini Manual de la flora de los alrededores de Buenos Aires. 1978 (Man BuenAir)
  • Campbell, F. T., ed. Report of National Coalition of Exotic Plant Pest Councils. 1995 (unpublished draft) (Rep NCEPPC)
  • Czerepanov, S. K. Vascular plants of Russia and adjacent states (the former USSR). 1995 (L USSR)
  • Davis, P. H., ed. Flora of Turkey and the east Aegean islands. 1965-1988 (F Turk)
  • Encke, F. et al. Zander: Handwörterbuch der Pflanzennamen, 13. Auflage. 1984 (Zander ed13)
  • Erhardt, W. et al. Zander: Handwörterbuch der Pflanzennamen, 16. Auflage. 2000 (Zander ed16)
  • Euro+Med Editorial Committee Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). (EuroMed Plantbase)
  • FNA Editorial Committee Flora of North America. 1993- (F NAmer)
  • Gleason, H. A. & A. Cronquist Manual of vascular plants of northeastern United States and adjacent Canada. 1963 (Glea Cron)
  • Groth, D. 2005. pers. comm. (pers. comm.)
  • Hess, H. E. et al. Flora der Schweiz, ed. 2. 1976 (F Switz)
  • Hitchcock, C. L. et al. Vascular plants of the Pacific Northwest. 1955-1969 (F Pacif NW)
  • Instituto de Botánica Darwinion Flora del Conosur. Catálogo de las plantas vasculares. 2008 (F ConoSur)
  • Kartesz, J. T. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 1994 (L US Can ed2)
  • Komarov, V. L. et al., eds. Flora SSSR. 1934-1964 (F USSR)
  • Krasnoborov, I. M., ed. Flora of Siberia (English translation). 2000- (F Siberia)
  • Liberty Hyde Bailey Hortorium Hortus third. 1976 (Hortus 3)
  • Ochsmann, J. Knapweeds (Centaurea L. and some related genera) in North America (Centaurea Pages)
  • Scoggan, H. J. The flora of Canada, 4 vol. 1978-1979 (F Canada)
  • Seed Regulatory and Testing Division, Agricultural Marketing Service, U.S.D.A. State noxious-weed seed requirements recognized in the administration of the Federal Seed Act (updated annually). (State Noxweed Seed)
  • Sell, P. & G. Murrell Flora of Great Britain and Ireland. 1996- (F GB Ire)
  • Steyermark, J. A. Flora of Missouri. 1977 (F Missouri)
  • Tutin, T. G. et al., eds. Flora europaea. 1964-1980 (F Eur)
  • USDA National Agricultural Library National Invasive Species Information Center (on-line resource). (Nat Invasive Sp Info)
  • Wu Zheng-yi & P. H. Raven et al., eds. Flora of China (English edition). 1994- (F ChinaEng)

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