pink purple thistle flower in sunny background

asteraceae background bloom blossom blossoming branch bud bullthistle cirsium cirsiumvulgare close closeup color colorful common commonthistle delicate field flora flower floweringplants garden grassland head herb isolated macro meadow medicinal medicine milk nature pasture petal pink plant pricker prickle purple saint scotch silybum spike spring sunny thistle thistleflower treatment twig variegated weed wild willow