Taxon: Centaurea diffusa Lam.

A declared aquatic or terrestrial noxious weed and/or noxious-weed seed in these U.S. states (see state noxious weed lists), with links to state information or web documents:

AZ*°, CA*, CO*°, ID*°, MT*°, ND*, NE*°, NM*, NV*, OR*°, SD*, UT*°, WA*°, WY*°.

ªAquatic.

*Terrestrial.

°In seed.

Link to noxious weed information from

Link to species profile at

Common names:

• diffuse knapweed   (Source: World Econ Pl ) – English
  
• white knapweed   (Source: Zander ed16 ) – English
  
• Sparrige Flockenblume   (Source: Zander ed16 ) – German
  
• centáurea   (Source: D. Groth, p.c. 2005) – Portuguese (Brazil)
  

Economic importance:

• Weed: also potential seed contaminant   (fide Rep NCEPPC)
  

Distributional range:

• ASIA-TEMPERATE
  Western Asia: Turkey [n.w.]
  Caucasus: Armenia; Azerbaijan; Georgia; Russian Federation - Ciscaucasia, Dagestan
• EUROPE
  East Europe: Moldova; Ukraine [incl. Krym]
  Southeastern Europe: Bulgaria; Former Yugoslavia; Greece; Romania

• naturalized elsewhere

References:

• Cabrera, A. L. & E. M. Zardini. 1978. Manual de la flora de los alrededores de Buenos Aires. (Man BuenAir)
• Campbell, F. T., ed. 1995. Report of National Coalition of Exotic Plant Pest Councils. (unpublished draft) (Rep NCEPPC)
• Czerepanov, S. K. 1995. Vascular plants of Russia and adjacent states (the former USSR). (L USSR)
• Davis, P. H., ed. 1965–1988. Flora of Turkey and the east Aegean islands. (F Turk)
• Encke, F. et al. 1984. Zander: Handwörterbuch der Pflanzennamen, 13. Auflage. (Zander ed13)
• Erhardt, W. et al. 2000. Zander: Handwörterbuch der Pflanzennamen, 16. Auflage. (Zander ed16)
• Gleason, H. A. & A. Cronquist. 1963. Manual of vascular plants of northeastern United States and adjacent Canada. (Glea Cron)
• Groth, D. 2005. pers. comm. [re. Brazilian common names].
• Hess, H. E. et al. 1976. Flora der Schweiz, ed. 2. (F Switz)
• Hitchcock, C. L. et al. 1955–1969. Vascular plants of the Pacific Northwest. (F Pacif NW)
• Kartesz, J. T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. (L US Can ed2)
• Komarov, V. L. et al., eds. 1934–1964. Flora SSSR. (F USSR)
• Liberty Hyde Bailey Hortorium. 1976. Hortus third. (Hortus 3)
• Ochsmann, J. 2001. Knapweeds (Centaurea L. and some related genera) in North America. In: Ochsmann, J., Welcome to the Centaurea pages. (Centaurea Pages)
• Scoggan, H. J. 1978–1979. The flora of Canada, 4 vol. (F Canada)
• Seed Regulatory and Testing Branch, Agricultural Marketing Service, U.S.D.A. 1999. State noxious-weed seed requirements recognized in the administration of the Federal Seed Act. (State Noxweed Seed)
• Steyermark, J. A. 1977. Flora of Missouri. (F Missouri)
• Tutin, T. G. et al., eds. 1964–1980. Flora europaea. (F Eur)
• USDA National Agricultural Library. National Invasive Species Information Center (Nat Invasive Sp Info)

More:

Search AGRICOLA article citation database for citations referencing Centaurea diffusa.

Search NCBI's Entrez search engine for PubMed citations referencing Centaurea diffusa.

Check other databases for Centaurea diffusa Lam.:

• Flora Europaea: Database of European Plants (ESFEDS)
• Euro+Med Plantbase: Information Resource for Euro-Mediterranean Plant Diversity
• ePIC: Electronic Plant Information Centre of Royal Botanic Gardens, Kew
• AGRICOLA: Article Citation Database or NAL Catalog of USDA's National Agricultural Library
• Entrez: NCBI's search engine for PubMed citations, GenBank sequences, etc.

Images:

• Forestry Images: Images of invasive weeds from www.forestryimages.org
• Fruits: Seed ID Workshop image, from Department of Horticulture and Crop Science, Ohio State University

More:

• Check PlantSystematics.org for additional images
• Images Note: Be advised that their identity may be inaccurate. Proper identification of a plant may require specialized taxonomic knowledge or comparison with properly documented herbarium material.

Abbreviations & symbols in GRIN Taxonomy

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