bighead knapweed, lemon fluff or armenian basketflower (centaurea macrocephala) blooming with a flower that

armenian basketflower bighead knapweed centaurea macrocephala bachelor 039 button bed big yellow botanic botanical botany closeup detailed florets flowering garden gardening growing hardhat head introduced lemon fluff macro nature ornamental outdoors petals plant summer sun sunlight vegetation weed close-up shot blooming flower