Purple-Spored Puffball (Calvatia cyathiformis)

''Calvatia cyathiformis'', or Purple-spored Puffball, is a large edible saprobic species of ''Calvatia''. This terrestrial puffball, has purplish or purple-brown spores, which distinguish it from other large Lycoperdales. It is found mostly in prairie or grasslands of North America, Australia, and probably elsewhere.