This Hetalia photo contains
common sunflower, mirasol, helianthus annuus, sunflower, and helianthus.
There might also be
black eyed susan, rudbeckia hirta, rudbeckia serotina, giant sunflower, tall sunflower, indian potato, helianthus giganteus, blue eyed african daisy, arctotis stoechadifolia, and arctotis venusta.