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 Kenya flora team(2026). Flora of Kenya: Glossary details: cystolith. https://www.kenyaflora.com/speciesdata/glossary-display.php?glossary_id=196, retrieved 14 August 2026
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