Ok, I think these are right, but as always with Russulas it seems, I'm not completely sure. They are acrid, but they are slowly acrid, taking 5-10 secs. to really develop the burn. The caps are reddish, which could be R. silvicola (R. cremoricolor), but those are always quickly acrid for me. Plus these are not really red. The caps are differently shaped than most of the R. silvicola I find, more centrally depressed and upturned. Also the color is more pink, with salmon-orange-pink tones. The older caps, the color is fading away to a brown grey, with only the center pinkish/red/salmon-orange.