The sporocarps are functionally and developmentally modified leaves, although they have much shorter stalks than the vegetative leaves. Inside the sporocarp, the modified leaflets bear several sori, each of which consists of several sporangia covered by a thin hood of tissue (the indusium).
In fungi, the parts responsible for producing spores are modified leaf-like structures, which differ from regular vegetative leaves in having shorter stalks. These modified leaflets have sori, which are clusters of sporangia covered by a thin membrane.