 Calbovista is a fungal genus containing the single species Calbovista subsculpta , commonly known as the sculptured puffball , sculptured giant puffball , and warted giant puffball . It is a common puffball of the Rocky Mountains and Pacific Coast ranges of western North America . The puffball is more or less round with a diameter of up to 15 cm ( 6 in ) , white becoming brownish in age , and covered with shallow pyramid @-@ shaped plates or scales . It fruits singly or in groups along roads and in open woods at high elevations , from summer to autumn . 
