globe thistle echinops ritro member of the aster family

globe thistle echinops ritro member aster family flower background floral summer nature leaf spring ball botany flora bloom blossom blue botanical green head macro natural plant purple stem wild wildflower asteraceae barbed beautiful bud buds bush closeup bannaticus echinop gardens glove flowers herbaceous border leaves perennial pot pollen prickly season sphaerocephalus spiny