The common puffball grows in small clusters on the Barff. When the fruiting body is mature, a hole opens at the top and when it is bumped by a passing animal or even hit by raindrops, a cloud of spores is puffed out of the hole. The spores will drift away on the wind and help the fungus spread. The fruiting bodies of the common puffball are pear or club-shaped, with an obvious stem. They're whitish at first, becoming browner with age. The surface is covered with short, bobbly warts. These break off as the puffball ages, leaving little scars on the surface. They can be seen around the woodland, especially close to the Oaks, from the end of June through till the end of October.