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I have never seen such a place as Ct for 'shrooms of all sorts. Never found Ps. genus but many, many others. Cinnamon chanterelles, Amanitas (not muscaria but the fatal ones), many others. Very hard to preserve however as the air there seems to turn them to ucky glop rather than to dry them properly. Many bugs and insects too.
OBN
When I had put the old "cow pies" in the old barn there were a few that had these real small mushrooms grow, I had seperated them and kept trying to pick them and dry them but they just turned to mush, like liquified black.