Skye Flora

Knapweed


Centaurea nigra

 

Centaurea nigra

Photo © Carl Farmer
23 Sep 2002 Glenbrittle

Very common in grassland and moorland, roadsides, forestry rides.

Flowerhead diameter c 3 cm

Skye ID: Unmistakable.  When in bud or fruit can still be recognized by the involucral bracts with long bristles.

Other features: Flowers occasionally white.  Probably all Skye plants belong to subspecies Nigra, which has the stem well swollen beneath the flowerhead as in pic on left.

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Centaurea nigra

Photo © Carl Farmer
23 Aug 2003 Staffin

  Centaurea nigra

Photo © Carl Farmer
1 Aug 2004 Portree
Flower c 2.9 cm across at widest

 

Centaurea nigra

Photo © Carl Farmer
15 Oct 2003 Portree
c 2 cm across at top

  Centaurea nigra

Photo © Carl Farmer
30 Dec 2003 Scorrybreac

Left: Flowerhead after seeds dispersed.
The colour in the centre gradually fades.

Above: Winter stems


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