Welted thistle (curly plumeless thistle)
Carduus crispus

Tall hairy plant to 2 metres, stems branched and spiny winged, except just below the flowerheads. Leaves oblong to lanceolate, pinnately lobed, weak spined. Flowerheads reddish purple, 10 to 25 mm erect, solitary or in small clusters. Flower bracts slightly spreading or erect with a weak spine tip.