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Centaurea nigra
Also known as “Hardheads” or “Black knapweed”, this wild flower is one of our toughest meadow plants.
Knapweed is a firm favourite of our pollinating insects, being a source of good quality nectar. And as well as supporting our bee, butterflies and beetles its seeds provide food for many birds.
Somewhat thistle-like, common knapweed can be identified by its slightly spherical black/brown flower head, growing alone, topped with purple, pink or (more rarely) white. The bracts are triangular in shape. Its leaves are linear to lance-like in shape with incomplete lobes.
Greater knapweed – a close relation – is similar but its flowers are more garish and opulent and its leaves are fully lobed.
Found throughout Britain.
Knapweed is a wild flower of meadows and other grassland habitats from lawns to cliff-tops. It can often be seen on road verges where wildlife is allowed to thrive and also in hedgebanks.
In flower, June to September.
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