persicaria orientalis flower blooming in the garden. princess-feather plant in pink color during summer season

august autumn bistort bloom blooming blossom botanical branch close closeup color colorful country decorative eastern environment feather flora floral flower flowerbed flowers garden inflorescence knotgrass knotweed leaf natural nature orientale orientalis outdoor outside persicaria petal pink plant polygonum princes princess princessfeather purple season smartweed summer texture