Dothidella betulina f. betulae-nanae (Wahlenb.) P. Karst.
Fungi | Ascomycota | Dothideomycetes | [incertae sedis] | Polystomellaceae | Dothidella | Dothidella betulina
leaves of Betula nana
Lule Lappmark, Sarek National Park [Alpes Sarjekenses]