Urocystis ulmariae (Liro) Vánky, 1985
lead-coloured, elongated blisters on the petioles and veins that rupture longitudinally, releasing a blackish brown, granular-powdery mass of spore balls. The easily disintegrating spore balls consist of 1-8 spores, with only a few peripheral sterile cells.
Rosaceae, narrowly monophagous
Buhr (1964b), Klenke & Scholler (2015a), Vánky (1994a), Woods, Chater, Smith ao (2018a).