Lycoperdon perlatum

Lycoperdon perlatum, popularly known as the common puffball, warted puffball, gem-studded puffball or devil's snuff-box, is a species of puffball fungus in the family Agaricaceae. It is a medium-sized puffball with a round fruit body tapering to a wide stalk, and dimensions of 1.5 to 6 cm (1⁄2 to 2+1⁄4 in) wide by 3 to 10 cm (1+1⁄4 to 4 in) tall. It is off-white with a top covered in short spiny bumps or "jewels", which are easily rubbed off to leave a netlike pattern on the surface. When mature it becomes brown and a hole in the top opens to release spores in a burst when the body is compressed by touch or falling raindrops. A widespread species with a cosmopolitan distribution, the species grows in fields, gardens, and grassy clearings. It is edible when young and the internal flesh is completely white, although care must be taken to avoid confusion with immature fruit bodies of poisonous Amanita species. L. perlatum can usually be distinguished from similar puffballs by differences......read more on Wikipedia.