Cystidia may have a capping of coarse crystals or resinous material. This is often associated with thick walls, particularly for a crystalline capping (when the cystidia are called metuloids) (see Thick-walled cystidia).

Choose this state if: there is an obvious capping of coarse crystals or resinous material on the apex of hymenial cystidia (cheilocystidia and/or pleurocystidia).