Physoderma flammulae (Büsgen) Fischer
blackish-brown pustules, filled with spores, on the leaves.
Ranunculaceae, narrowly monophagous
The position of this species is unclear. The Index Fungorum (2014) does not know a Physoderma flammulae; it does know the synonym Cladochytrium flammulae Büsgen, 1887, but that is placed in a different family.
Brandenburger (1985a: 150), Buhr (1965a), Klenke & Scholler (2015a).