bistort or snakeweed (persicaria bistorta) 'superbum' flowering with spikes of soft pink flowers

bistort persicaria bistorta superba superbum attractive bloom blooming border botanic botany close closeup decorative detailed flora floral flower flowering flowers garden gardening green growing growth leaves macro nature ornamental outdoors park parks petals pink plant snakeweed soft spikes summer vegetation close-up shot 'superbum' clump clumps rich