The shaggy inkcap mushroom (Coprinus comatus) is a common mushroom that is also known as lawyer’s wig or shaggy mane. Reportedly is is an excellent mushroom to eat when young, but only immediately after picking. It turns black and dissolves into an inky mess soon after it is picked (which is why it is called inkcap).
The pictures below show a lone inkcap alongside a local road and a group of them seen in Minnesota’s Itasca State Park.
An excellent specimen of shaggy inkcap along a roadside
A group of shaggy inkcaps found in Itasca State Park
North MN Outdoors 