Buttercup, Meadow buttercup, Ranunculus acris, Single yellow flower growing outdoor amid green foliage.

Globe Thistle, Echinops bannaticus.

Globe Thistle, Echinops.

Globe Thistle, Echinops orientalis.

Globe Thistle, Echinops orientalis.

Globe Thistle, Echinops ritro.

Globe thistle, Echinops.

Globe thistle, Echinops bannaticus.

Globe Thistle, Echinops ritro.

Globe Thistle, Echinops bannaticus.

Globe Thistle, Echinops bannaticus.

Globe thistle, Echinops bannaticus 'Taplow Blue'.

Spherical flower heads of Echinops ritro Veitch's Blue.