persicaria amphibia or longroot smartweed floating on the pond surface. several species of the plant with pink flowers and green

amphibia amphibious aquatic background beautiful bistort bloom blossom blue botany environment flora floral flower focus fresh green herb inflorescence knotweed lake landscape leaf longroot marsh nature outdoor peaceful persicaria pink plant pond pool reflection river scenery scenic serenity smartweed summer surface tranquil travel water weed wild wildflower