Pycnidium
pycnidium (noun, pl. pycnidia) – neutral term for a minute globose to flask-shaped (pear-shaped) structure, resembling a perithecium and usually immersed in the medulla; opening to the surface by a tiny (often visible only under a dissecting microscope), often darkened, pore; containing a cavity lined with specialized hyphal structures (fulcra) producing pycnospores (small spores of unknown function, which might function either as spermatia or conidia); sometimes branched or chambered. Referred to as a spermogonium when the spores are believed to function as spermatia.
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