Diderma crustaceum

Peridium double, with a whitish fragile outer layer and a persistent membranous inner layer with bluish tints underneath.

Columella absent.

Capillitium formed by slender threads with pale brown pigment, connected with each other but not forming a complete reticulum.

Spores globose to slightly angular through compression, brown under the microscope, ornamented with abundant darker spines.

Herbarium material available: 2522/25.