Urocystis nivalis (Liro) Zundel, 1953
sori as blister-like swelling of the leaf veins, petioles, and stems. When they are ripe and rupture, a black powdery-granular mass of spore balls is released. The spore balls consist of 1-5 spores; the mantle of sterile cells that is the hallmark of Urocystis is reduced here to just a few cells.
Ranunculaceae, nauw monophagous
Ranunculus acris, nivalis, pygmaeus, sulphureus.
Buhr (1965a), Klenke & Scholler (2015a), Vánky (1994a).