That is exactly why I took interest in mushrooms, I'm there anyways.
It was apparently an exceptionaly good year for mushroom hunting in Alaska last year and we deffinately saw more than one variety. I don't remember the black and white stalks, and some even had stalks that were half that wide, but it has been a while ago now.
I didn't take any pictures of them either, maybe the parents did; this is as close as I can find from mine, but if I remember correctly it had gills:
I took the picture for other reasons though.....