The microscope shows that the gleba is composed of a great number of spores mixed with simple or branched threads.
The pileus is conical in shape, and after the disappearance of the gleba the surface of the pileus is merely granular.
When old the gleba consists of a dusty mass of threads and spores.
The peridium is very large, breaking away in fragments when ripe and exposing the gleba.
The spore-mass or gleba, in its young state, is surrounded by four layers.
The gleba is composed of semi-persistent cells, plainly seen with a glass or even with the naked eye.
Allied to Scleroderma and distinguished by the cavities of the gleba containing distinct peridioles.