Calvatia bovista
Calvatia bovista is a species of Calvatia mushroom.
Description
The fruiting body is high and wide, round on top with a wide stemlike sterile base, often half the height of the fruiting body. The spores are 4–6.5 μm, round, minutely warted or spiny. The spore print is white and cheesy when young, brownish and dry in age.It is the second largest Calvatia in North America.