Urocystis mayorii (Ciferri) Uljanishchev, 1968
short or long striae over the leaf, sometimes so numerous that the entire surface is occupied. When they rupture a blackish-brown, odourless, powdery mass of spore balls is released. These consist of 1-2 spores, completely covered by a layer of small sterile cells.
Buhr (1965a), Klenke & Scholler (2015a), Vánky (1994a).