So interesting to see how nature diverges: We don't see this Lepiota on the central Oregon coast, though we have a similar one with a smooth stipe. They also are pretty much out of season here now. Looks like it's Mushroom Season in the redwoods eh?
They sure are a long way from their natural home! Kind of startling to see them in Alaska. Bison are never truly domesticated; they have only been "ranched" for the last few decades. They don't observe fences particularly, and are naturally inclined to roam in order to find food, especially during winter. What do they graze on there I wonder?