centaurea jacea brown knapweed or brownray knapweed yellow flower on stem, blue sky background

background beautiful beauty bloom blossom botanical botany brown brownray centaurea closeup color colorful cornflower dry environment field flora floral flower garden golden grass green growing growth herb jacea knapweed leaf macro meadow natural nature officinale outdoor pasture petal plant rural season sky soft spring stem summer thistle top ukraine view wild yellow