gleba definition. Mycological Glossary. Illinois Mycological Association. Alirita 2008-10-24 . “As the spores mature, the sporogenous cells often liquify and/or disintegrate, leaving just the spores behind as a powdery mass that can easily blow away... In other cases, the gleba may be sticky, as in Sphaerobolus stellatus; or it may be enclosed in a case (called a peridiole), as in the Nidulariaceae.”.