{{Short description|Species of fungus}} {{Speciesbox | parent = Diatrype | taxon = Diatrype virescens | image = Diatrype virescens 251172381.jpg | authority = (Schwein.) M.A. Curtis }}
'''''Diatrype virescens''''' is a carbonaceous pyrenomycete in the family Diatrypaceae. It grows uniquely on the wood of American beech (''Fagus grandifolia'') in North America. Its growth structure is immersed, popping out from under the bark in scattered green fruiting bodies which soon fade to black.<ref name=":0">{{Citation |title=Great Smoky Mountains National Park, U.S.A. |date=2019-11-11 |url=http://dx.doi.org/10.1007/978-981-13-2538-0_977 |work=Dictionary of Geotourism |page=231 |access-date=2024-01-02 |place=Singapore |publisher=Springer Singapore |doi=10.1007/978-981-13-2538-0_977|url-access=subscription }}</ref>
== Description == ''Diatrype virescens'' grows from under the bark, pushing it aside in a conspicuous manner. The fruiting body is yellowish-green, and ranges 2.5–4 mm in diameter. The color fades into brown and black and soon can look similar to ''Biscogniauxia marginata''. There are usually several sulcate (grooved) ostioles per fruiting body.<ref name=":0" />
Microscopic features are: "Asci clavate, p. sp. 35–40 × 4–6 μm. Ascospores (10)12–14 × 2.5–3 μm."<ref name=":0" />
This fungus is found in North America growing only on ''Fagus grandifolia''.<ref name=":0" />
=== Distinguishing features === The green circular fruiting bodies with the black grooved ostioles popping out gregariously make ''D. virescens'' an easy to identify member of ''Diatrype''.
=== Similar species === ''Biscogniauxia marginata'' is the most likely to be confused with older specimens of ''D. virescens'' that have lost their green colour. ''B. marginata'' can be distinguished by its larger size (3-8mm in diameter), and its tendency to grow on trees in the family Rosaceae rather than ''Fagus grandifolia''.<ref>{{Cite web |title=Biscogniauxia marginata |url=http://pyrenomycetes.free.fr/biscogniauxia/html/Biscogniauxia_marginata.htm |access-date=2024-01-02 |website=pyrenomycetes.free.fr}}</ref>
== References == {{reflist}}
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Category:Fungal plant pathogens and diseases Category:Xylariales Category:Fungi described in 1832 Category:Taxa named by Lewis David de Schweinitz Category:Fungus species