purple flower of sea aster or seashore aster on white background. tripolium pannonicum

flower plant branch blossom twig lilac shrub produce leaf petal herb bouquet tree pink spring purple sea aster seashore isolated white background tripolium pannonicum flower isolated plant pink white tripolium pannonicum sea aster seashore violet purple flowers bloom blooming herb marsh wetland swamp nature pannonicus wild wildflower europe