This grower is sure of this plant identification.
Echinops ritro (Globe thistle). This is a compact deciduous, perennial clump, The flowers are thistle-like and round, they are produced in shades of blue in the summer. The leaves are pinnatifid to pinnatisect and grey-green, they are smooth on top and hairy on the underside. You will need to divide only after the plants are at least 3 years old, they are easy to grow.
They are fully hardy and will grow well in full sun in poor soil. Dead head to prevent self seeding.
Dried arrangements, ornamental, border Summer/Autumn interest.