Permaculture Guild Identified: Pinus sp. and Amanita sp.

My parents have several Pinus strobus and Pinus resinosa growing around the edge of the their property. About two years ago, some mushrooms fruited. They were recently identified as Amanita muscaria var. guessowii Veselý. Funny thing is that in the just over 20 years they've lived there, this was the first, and so far, only fruiting. Since I plan on planting several Pinus koraiensis, I think I'll get some soil from under my parents trees to inoculate my trees.