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Centaurea jacea

Family:Asteraceae
Species:Centaurea jacea L.
Common Name:brown knapweed
Habitat:Pastures, successional fields, roadsides, and disturbed areas. A very common weedy species sometimes forming dense patches but mostly thinly distributed throughout an area. Many plant show introgression toward C. nigra even when C. nigra is not nearby. These individuals probably represent the morphologically variable nothospecies C. x moncktonii.
Associated Ecological Communities:**
Growth Habit:Forb/herb
Duration:Perennial
Category:Vascular
Plant Notes:**
Taxonomic Notes:The Centaurea jacea complex which is European in origin is a difficult group due to hybridization, polyploidy, apomixis, and morphological variation (see Keil and Ochsmann [2006] for a brief overview). Keil & Ochsmann (2006) in FNA follow the “traditional approach for North America” and recognize three species (C. jacea, C. nigra, and C. nigrescens) and a nothospecies (C. x moncktonii). This does align (albeit with some modifications) with Fernald (1950) and Gleason and Cronquist (1991). We also follow this approach.
Status:Not Native, Naturalized, GNR (Global Rank)
References:**

** Not applicable or data not available.

Classification

SupraordinalEudicots
Order Asterales
FamilyAsteraceae
Genus Centaurea
Species Centaurea jacea L. - brown knapweed

Citation

Citation Centaurea jacea L.
Basionym: **
Type: **

** Not applicable or data not available.

Source

CountyYearHerbariaNotesSubmission Info
Albany  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Cattaraugus  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Cattaraugus1981 BUF – Herbarium # 58365
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Cayuga2004 STERL
Herbarium Name Used: none Centaurea jacea
   
Cayuga2005 STERL
Herbarium Name Used: none Centaurea jacea
   
Chautauqua1990 NYS
Herbarium Name Used: none Centaurea jacea
   
Columbia  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Delaware  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Erie  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Erie1997 BUF – Herbarium # 76589
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1976 BUF – Herbarium # 73549
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1989 BUF – Herbarium # 70630
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1988 BUF – Herbarium # 68484
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1976 BUF – Herbarium # 73564
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1975 BUF – Herbarium # 73550
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1975 BUF – Herbarium # 73552
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1975 BUF – Herbarium # 73553
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1975 BUF – Herbarium # 73554
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1974 BUF – Herbarium # 73556
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1967 BUF – Herbarium # 73566
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1967 BUF – Herbarium # 73567
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1967 BUF – Herbarium # 73568
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1962 BUF – Herbarium # 73546
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1933 BUF – Herbarium # 77888
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1931 BUF – Herbarium # 73547
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Erie1924 BUF – Herbarium # 73398
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Essex  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Fulton2007 NYS – 230
Herbarium Name Used: Centaurea jacea
  12/22/2009 - Donna Vogler
Fulton2007 FMCC – 230
Herbarium Name Used: Centaurea jacea
  12/22/2009 - Donna Vogler
Genesee  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Genesee1986 BUF – Herbarium # 73562
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Genesee1967 BUF – Herbarium # 73565
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Greene  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Hamilton  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Herkimer  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Livingston1967 BUF – Herbarium # 73559
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Monroe1976 BUF – Herbarium # 73551
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Montgomery2005 FMCC
Herbarium Name Used: Centaurea jacea
Town of Palatine 8/30/2009 - Connie Tedesco
Montgomery2005 NYS
Herbarium Name Used: Centaurea jacea
Town of Palatine 8/30/2009 - Connie Tedesco
Niagara1991 BUF – Herbarium # 74021
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Niagara1986 BUF – Herbarium # 55354
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Oneida  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Onondaga  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Onondaga1926 BH
Herbarium Name Used: Centaurea jacea
Werier (2017) voucher!; G.P. VanEseltine 3210 3/6/2018 - David Werier
Orange1990 NYS
Herbarium Name Used: none Centaurea jacea
   
Orleans  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Orleans1972 BUF – Herbarium # 73563
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Orleans1967 BUF – Herbarium # 73548
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Orleans1967 BUF – Herbarium # 73558
Herbarium Name Used: Centaurea jacea
  12/18/2009 - BUF (Ed Fuchs)
Oswego1973 RCFS – accession # 10314
Herbarium Name Used: Centaurea jacea
  11/17/2009 - RCFS (Andy Nelson)
Oswego1970 RCFS – accession # 10315
Herbarium Name Used: Centaurea jacea
  11/17/2009 - RCFS (Andy Nelson)
Oswego1968 RCFS – accession # 10316
Herbarium Name Used: Centaurea jacea
  11/17/2009 - RCFS (Andy Nelson)
Oswego1970 RCFS – accession # 10907
Herbarium Name Used: Centaurea jacea
  11/17/2009 - RCFS (Andy Nelson)
Oswego1971 RCFS – accession # 10909
Herbarium Name Used: Centaurea jacea
  11/17/2009 - RCFS (Andy Nelson)
Otsego2005 SUCO
Herbarium Name Used: none Centaurea jacea
Town of Oneonta  
Queens  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Queens1993 BKL – BKL00014992
Herbarium Name Used: Centaurea jacea
  2/8/2012 - BKL (Steve Glenn)
Rensselaer1996 NYS
Herbarium Name Used: none Centaurea jacea
   
Rensselaer1997 NYS
Herbarium Name Used: none Centaurea jacea
   
Rockland1990 NYS
Herbarium Name Used: none Centaurea jacea
   
Seneca  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
St. Lawrence1992 NYS
Herbarium Name Used: none Centaurea jacea
  Anne Johnson
Suffolk  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Suffolk1994 BKL – BKL00011449
Herbarium Name Used: Centaurea jacea
  2/8/2012 - BKL (Steve Glenn)
Tompkins  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Ulster1956 CONN
Herbarium Name Used: none Centaurea jacea
   
Ulster  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Washington  NYFA_1990
Herbarium Name Used: none Centaurea jacea
   
Yates1971 NYS
Herbarium Name Used: none Centaurea jacea
   

Synonyms

No synonyms exist for this species.