1.  spore case(n = noun.plant) sporangium, spore sac - organ containing or producing spores;
is a kind of reproductive structure
has particulars: macrosporangium, megasporangium, microsporangium, eusporangium, leptosporangium, tetrasporangium

2.  spore case(n = noun.plant) sporocarp - specialized leaf branch in certain aquatic ferns that encloses the sori or clusters of sporangia;
is a kind of reproductive structure

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