Urocystis avenastri (Massenot) Nannfeldt, 1959
on Avenula, Helictochloa
long striae between the veins of the leaves and leaf sheaths; when the epidermis ruptures a powdery brownish black mass of spore balls is released. The spore balls consist of 1-4 spores, completely covered by a layer of smaller sterile cells.
Poaceae, narrowly oligophagous
Urocystis rytzii (Massenot) Müller, 1991 (Vánky).
Buhr (1964b), Klenke & Scholler (2015a), Kruse, Thiel, Beenken ao (2018d), Lotze-Engelhard (2010a), Scholz & Scholz (2013a), Tomasi (2014a), Vánky (1994a).