Fungus
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A fungus is any member of the group of eukaryotic organisms that includes yeasts, molds, as well as mushrooms. These organisms are classified in the biological kingdom Fungi.
Omphalotus nidiformis, a bioluminescent mushroom
Bracket fungi on a tree stump
Widespread white fungus in wood chip mulch in an Oklahoma garden
Ascomycota
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The Ascomycota are a phylum in the kingdom Fungi that, together with the Basidiomycota, form the subkingdom Dikarya. Members of Ascomycota are commonly known as the sac fungi or ascomycetes. It is the
A member of the genus Ophiocordyceps which is parasitic on arthropods. Note the elongated stromata. Species unknown, perhaps Ophiocordyceps caloceroides.
The "candlesnuff fungus" in its asexual state, Xylaria hypoxylon
The ascocarp of a morel contains numerous apothecia.