single purple blue mountain cornflower, centaurea montana or montane knapweed, bachelors button, green leaf background

alive angiosperm asteraceae bachelor bachelors beautiful beauty bloom blooming blue botanical botany bright button centaurea closeup clump cluster colourful compositae cornflower delicate flora floral flower flowering foliage garden green group growing heads horizontal horticulture knapweed leaf leaves macro montana montane mountain natural nature one outdoors perennial petal petals plant purple sideview single spring stalk stem summer texture thistle vibrant wildflower