onopordum acanthium, cotton thistle also known as scotch thistle against a blue sky

plant nature thistle flower flora summer bloom natural background blossom green garden onopordum acanthium botany floral purple cotton asteraceae herb wild weed blooming prickly field pink bud botanical wildflower scotch herbaceous medicine macro meadow biennial thorny closeup thorn flowering leaves vegetation head beautiful beauty herbal scottish spiny health