51�Թ�

Aethalium a compound plasmodiocarp; the component sporangia branching and anastomosing in every direction, complicate and grown together; the walls of the sporangia a thin membrane, coated with minute, roundish granules of lime.

Aethalium with a thick fragile common cortex.

Aethalium very large, pulvinate, orbicular, elongated, or quite irregular, extremely friable, the surface tawny or ferruginous to ochraceous and whitish.

Aethalium 3–6 or sometimes many centimeters in extent and 1–2 cm. in thickness.

Aethalium naked, i. e., without a common cortex.