Valsa_leucostoma
Leucostoma persoonii
Species of fungal plant pathogen
Leucostoma persoonii is a plant pathogen, which causes perennial canker (also referred to as Cytospora canker and Valsa canker or Leucostoma canker).[1] On Species Fungorum the current name is given as Cytospora leucostoma (Pers.) Sacc., (1881)[2]