Common knapweed, Centaurea nigra.
Also known as ‘black knapweed’, Resembles a thistle. It is in bloom from June to September and is a huge favourite of all kinds of butterflies, including common blues, marbled whites and meadow browns.
![Common-knapweed Knapweed, common](https://www.parkland-walk.org.uk/wp-content/uploads/2023/08/Common-knapweed.jpg)
Common knapweed, Centaurea nigra.
Also known as ‘black knapweed’, Resembles a thistle. It is in bloom from June to September and is a huge favourite of all kinds of butterflies, including common blues, marbled whites and meadow browns.