Pigskin Puffball (Common Earthball)
Rounded, warted, yellowish brown ball; flesh blackish purple. Grows on the ground, on wood debris, and near trees in woods. July–October. Fruiting body rounded to flattened; outside yellowish brown; when very young, the inside is nearly white, but soon becomes marbled, then purplish, then blackish with age; texture leathery, thick-skinned, with coarse scales or warts; there is a pore at the top. Spore print blackish brown. Spores magnified are round, ornamented. Unlike edible puffballs, the pigskin puffball has a thick, rindlike skin.
Lookalikes: Pear-shaped puffball (Lycoperdon pyriforme) and gem-studded puffball (L. perlatum) are both white on the inside when young.