Unlike Geastrum, the young fruit bodies of A. hygrometricus do not have a columella (sterile tissue in the gleba, at the base of the spore sac).

Although it lacks a stipe, it has a rudimentary columella-a small cord of sterile tissue that extends to the center of the fruit body.

There is a 2-3 millimeter layer thick layer of sterile tissue between pore layers.

The columella is a column-like clump of sterile tissue to be found inside the inner peridium.

The cap margin has a band of sterile tissue that is rolled inwards when young.

There is no obvious columella (sterile tissue in the base of the gleba that extends into the gleba).

Columel'la (in plants), an axis of sterile tissue which passes through the center of the spore-case of mosses.

Dermatitis is very common from contact with Crotons and as fish have permeable skin and no sterile tissue the poisoning effect was greatly increased.

The sterile tissue between the lobes is called the connective.

The cap margin has a narrow band of sterile tissue that in young fruit bodies is curved inwards.