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Hymenium

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The hymenium is the fertile, spore-bearing tissue layer of many fungal fruiting bodies. It occurs in both Ascomycota and Basidiomycota, where it is made up chiefly of asci or basidia and often also contains sterile cells such as paraphyses or cystidia. The hymenium usually forms a palisade-like layer of cells extending outward from the supporting tissue on which spores are produced.