Pictorial guide to the flora of the British Isles

Home ⟩ Pictorial Guide ⟩ Asteraceae / Compositae ⟩ Centaurea macrocephala / giant knapweed

Centaurea macrocephala Muss. Puschk. ex Willd.

giant knapweed (Asteraceae / Compositae)

 SpreadBias within British IslesDirection of bias
Very localSlight tendencyS
Plant Atlas 2020
BSBI Distribution Map

Centaurea macrocephala is a large, yellow-flowering knapweed.

Padney (VC29: Cambridgeshire); 2016-09-01

 giant knapweed / Centaurea macrocephala: _Centaurea macrocephala_ is a large, yellow-flowering knapweed.

The phyllaries of Centaurea acrocephala are more than 10 mm wide.

Padney (VC29: Cambridgeshire); 2016-09-01

 giant knapweed / Centaurea macrocephala: The phyllaries of _Centaurea acrocephala_ are more than 10 mm wide.

All images copyright © Christopher J. Dixon unless otherwise indicated.

L-R: Bidens tripartita, Melilotus officinalis, Mimulus guttatus, Thalictrum flavum, Ranunculus peltatus, Anchusa arvensis, Malva alcea, Lolium perenne