Mushroom Identification OK. I was wrong about the mushrooms. My conclusion after much deliberation is that one of them is an Amanita pentherina, a dangerous hallucinogen related to the 'toadstool.' The other two are some form of Agaricus, I think they're Agaricus sylvicola and are edible. However, there is a form of this species which is poisonous. I don't think I'll risk eating them at this juncture.