Sclerotiniaceae
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The Sclerotiniaceae are a family of fungi in the order Helotiales. Many species in this family are plant pathogens.
Valdensia.heterodoxa..lindsey
Sclerotium
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Examples of fungi that form sclerotia are ergot, Polyporus tuberaster, Psilocybe mexicana, Agroathelia delphinii and many species in Sclerotiniaceae. Although not fungal, the plasmodium of slime molds
Sclerotia of the ergot species Claviceps purpurea developing on wheat spikes
Sclerotinia sclerotiorum sclerotia
Sclerotia initially were mistaken for individual organisms and described as separate species until Louis René Tulasne proved in 1853 that sclerotia are only a stage in the life cycle of some fungi.
Various stages in the life cycle of Claviceps purpurea