Myriostoma can be a fungal genus inside family Geastraceae. The particular genus is monotypic, containing the single kinds Myriostoma coliforme. It can be an earthstar, so named considering that the spore-bearing sack’s surface wall splits open in to the shape of a new star.Your fruit body, initially shaped like a puffball, is encased in the outer covering that splits open through the top to kind rays.