blossoming red bistort flower spike from close

amplexicaulis atrosanguinea atrosanguineum bistort bloom blooming blossom blossoms bright buckwheat closeup erect evergreen firetail flaming fleece flora flower foliage garden green groundcover herbaceous himalayan incarnadine inflorescence knotweed lanceolate leaves long mountain murrey nature nobody oblong park perennial persicaria plants polygonaceae polygonum red scarlet small spike stem stems summer