Cytospora

Cytospora
Dead spruces that have succumbed to Cytospora canker found in McIntyre Wild Area, Loyalsock State Forest, Lycoming County, Pennsylvania. Resin oozes from the cankers, solidifying into a thick, whitish mass resembling snow or hoarfrost.
Scientific classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Sordariomycetes
Order: Diaporthales
Family: Valsaceae
Genus: Cytospora
Ehrenb.
Species

Species include:

Cytospora is a genus of ascomycete fungi. The genus was first described in 1818 by Christian Gottfried Ehrenberg. Cytospora species are known as plant pathogens.