A poisonous toadstool which has a brownish-grey cap with fluffy white spots and white gills, found in woodland in both Eurasia and North America.
Amanita pantherina, family Amanitaceae, class Hymenomycetes.
Panther caps are distinguishable by their brownish-colored caps with off-white warts....
I've tried Fly agaric mushrooms (and panther caps) in my misguided experimental phase, and they contain a lot of the things that are poisonous in datura.