centaurea macrocephala common names, bighead knapweed

centaurea macrocephala common names bighead knapweed big yellow lemon fluff bachelor 39aph39 button hardhat armenian basketflower basket flower asteraceae beautiful bloom blooming blossom blossoming blume bright bumble bee carline centaury cirsium fen thistle field floral garden globe knapweeds heterophyllum marsh native natural nature plant poisonous pollen pollinating pollinator prick prickly season spiked stemless summer sunflower wild wildflower