These neat fungi are of the puffball family and are known as the poison pigskin puffball. The name derives from the warty, thick yellowy gold hide on the mushroom. They are fairly poisonous and are quite easily identifiable just by the hide, even when young. Late in the fall, the top hide splits open revealing a greenish black spore powder which is distributed by wind and rain. These should not be confused with other types of edible puffballs. When I was a kid, I used to stomp on these when they split open to watch the cloud of spores explode.