Italian Thistle, Compact-headed Thistle
Synonyms: Carduus pycnocephalus ssp. pycnocephalus
What may be italian thistle as seen on the weedy grass slopes of Beatty Creek RNA, several miles southwest of Riddle, OR.........June 10, 2017. If not this species, then it would be the similar Carduus tenuiflorus, which is also found in the area.