many squarrose knapweed, centaurea (cyanus) triumfettii - blue flowers from asteraceae family

flower nature plant spring petal purple violet blue green macro blooming natural summer detail blossom knapweed beauty flora wildflower asteraceae triumfetti bloom triumfettii centaurea closeup europe garden outdoor growing outside species botany central floral grass herbaceous leaf perennial background beautiful environment azure weed bright color compositae biological shallow selective focus botanic flowering agriculture