farm field flower plant ramble river sunset thistle thistles walk teasel blessed thistle carduus crispus carduus nutans carline thistle cirsium discolor cirsium helenioides cirsium heterophylum cnicus benedictus cotton thistle fade faded field thistle golden thistle melancholy thistle musk thistle nodding thistle onopordon acanthium onopordum acanthium weed bumblebee shallow DOF summer sunlight green macro nature bee purple thorns abstract country rural Arizona autumn barb beauty beige bloom blossom brown bur close closeup defense desert fall flora food forest grass herbal lavender meadow medicine natural needle November october orange petal pink prairie scotland seed sharp spear spike spine spiny spring wild wildflower