Sea holly, Eryngium variifolium close up of flower.

Sea holly, known as Miss Wilmott's ghost, Eryngium giganteum.

Foxglove, Digitalis purpurea, close up showing pattern inside flowers in sunlight.

Foxglove, Digitalis purpurea, close up showing pattern inside flowers.

Carthusian pink, Dianthus carthusianorum, close up of flowers.

Carthusian pink, Dianthus carthusianorum close up of flowers against pale grey background.

Carthusian pink, Dianthus carthusianorum, close up of flowers.

Carthusian pink, Dianthus carthusianorum, close up of flowers.

Carthusian pink, Dianthus carthusianorum, close up of flowers.

Bugloss, Pride of Madeira, Echium candicans, spikey blue coloured flower.

Bugloss, Pride of Madeira, Echium candicans, spikey blue coloured flower.

Musk thistle, Carduus nutans, spikey flowerhead seen from behind.