 Cystidia are cells of the fertile hymenium that do not produce spores.These sterile cells, which are structurally distinct from the basidia, are further classified according to their position.In "G. marginata", the pleurocystidia (cystidia from the gill sides) are 46–60 by 9–12 µm, thin-walled, and hyaline in KOH, fusoid to ventricose in shape with wavy necks and blunt to subacute apices (3–6 µm diameter near apex).