What mushroom is that?

False parasol is a highly poisonous mushroom producing severe gastrointestinal symptoms of vomiting and diarrhea. It is commonly confused with the shaggy parasol or shaggy mane, and is the most commonly consumed poisonous mushroom in North America. Its large imposing appearance and similarity to the edible parasol mushroom, as well as its habit of growing in areas near human habitation, are reasons cited for this.