worst weed of agricultural fields cisium arvense also called as corn thistle with pink flowers and thorns

agricultural also arvense background blooming blurred botanical botany bright called cirsium cisium corn cursed day decorative field fields flora flower flowers format gardening green hard hardtoeradicate head herb herbaceous herbal leaf meadow nature organic perennial pink plant prickly purple season sharp smallflowered sphere spiky stem stingerneedles structural summer sunny thistle thorn thorns thorny vertical violet way weed wild wildflower worst