a mineral concretion, usually crystals of calcium carbonate, within the epidermal cell of the leaves of some plants, (for example Urticaceae), almost always visible as light coloured spots in the leaves.
The Uganda flora team(2026). Flora of Uganda: Glossary details: cystolith. https://www.ugandaflora.com/speciesdata/glossary-display.php?glossary_id=196, retrieved 14 August 2026
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