Centaurea nigra var radiata DC.
(Common Knapweed - Rayed Form)

Taxonomic hierarchy:
VarietyCentaurea nigra var radiata (Common Knapweed - Rayed Form)
Species sensu latoCentaurea nigra sens. lat. (=nigra/debeauxii) (common knapweed, lesser knapweed, hardheads)
GenusCentaurea (knapweeds and star-thistles)
TribeCardueae (“thistles”)
SubfamilyLACTUCOIDEAE (“dandelions”)
FamilyASTERACEAE (daisies, dandelions and thistles, composite)
OrderASTERALES (daisies, dandelions, thistles and bell flowers)
SubclassEU-DICOTS (dicotyledonous flowering plants)
ClassMAGNOLIOPSIDA (flowering plants)
PhylumTRACHEOPHYTA (vascular plants)
KingdomPLANTAE (plants)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
Records of Centaurea nigra var radiata (Common Knapweed - Rayed Form) :
1: Centaurea nigra var radiata (Common Knapweed - Rayed Form)
14 Jul 2001 OSGR: SU56 51° 30’ N, 1° 10’ W Vice County: Berks (VC 22) England
Rayed form
Image 1: Capitulum - side viewImage 2: Capitulum - top viewImage 3: LeavesImage 4: Leaves - close-upImage 5: PlantImage 6: Capitula - faded and bud - side viewImage 7: Capitulum - bud - side viewImage 8: Capitulum - faded - side viewImage 9: Capitulum - LSImage 10: Capitulum - side viewImage 11: Flowering shootImage 12: Leaf apices - enlargedImage 13: Leaves - basalImage 14: Leaves - lower and upperImage 15: Leaves - lower and upper (2)Image 16: PhyllariesImage 17: PhyllaryImage 18: Phyllary - innerImage 19: Phyllary - outerImage 20: Ray florets
2: Centaurea nigra var radiata (Common Knapweed - Rayed Form)
4 Sep 1978 OSGR: SX68 50° 40’ N, 3° 50’ W Vice County: South Devon (VC 3) England
rayed form
Image 1: Capitula - bud and flower - side view - close-upImage 2: Capitula - side/oblique view - close-upImage 3: Capitulum - bud - side view - enlarged

Centaurea nigra var radiata (Common Knapweed - Rayed Form) may be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Centaurea nigra var radiata (Common Knapweed - Rayed Form)
BioInfoBioInfo (www.bioinfo.org.uk) has 0 host/parasite/foodplant and/or other relationships for Centaurea nigra var radiata (Common Knapweed - Rayed Form)
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