Cytospora leucostoma Leucostoma leucostoma Sphaeria leucostoma Valsa leucostoma Valsa persoonii 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.)
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