Dermea is a genus of ascomycete fungi which attack trees, especially Prunus fruit trees - for instance, D. prunasti causes greengage plum die-back. On the whole, although Dermea species are considered pathogenic, not many serious diseases have been reported to be caused by this genus. Dermea was initially authored in 1825 by the famous mycologist Elias Magnus Fries and contains at least 22 species.

Species