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Sori (clusters of sporangia) on the lower surface of the leaf
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English name: Fern Scientific name: Familia: Polypodiaceae Classis: Filicopsida Phylum: Pteridophyta Regnum: Plantae
The sporangia containing spores are arranged in clusters, called sori (singular sorus) at the underside of the leaves. In some genera the young sori are covered by kidney-shaped outgrowths called indusia (singular indusium)