Globe Thistle, Echinops 'Veitch's blue'.

Globe Thistle, Echinops.

Sea Holly, Eryngium maritimum.

Sea Holly, Miss Wilmott's ghost, Eryngium giganteum 'Miss Wilmott's ghost'.

Teasel, Dipsacus fullonum.

Studio shot of thistle-like flowers of Arctium lappa, Greater burdock, on a leafy syem against a white background.

Oxalis corymbosa, Pink wood sorrel, cluster of three flowers against green, three lobed leaf.