Submitter does not have a specimen
About knee high, all dried brown (last October). Needle like projections around where the flower had been. I've seen Yellow star thistle before and I have no doubt that is what it was, I've seen it in Idaho on the lower Main Salmon River. I used to be a river guide on the Rogue in the 70's. I float the river every other year or so. I pay attention to plants and have never seen this plant before on the Rogue. Didn't have a camera with me, but it looks just like the picture on this website.