Uromyces cristulatus Tranzschel, 1910
No host plant alternation, only blackish brown, hypophyllous telia. Teliospores one-celled, ob-pyriform, wall with confluent warts, forming low, shorter or longer irregular ridges. In the telia also a few spinulose urediniospores are formed, with 4 germination pores. Infected shoots are abnormally elongated, but otherwise there are no malformations.
Euphorbiaceae, narrowly monophagous
Euphorbia petrophila, seguieriana.
Klenke & Scholler write that the telia develop on yellow leaf spots; moreover the sculpture of the teliospore wall would, contrary to the description by Gäumann, consist of polygonal plates.
Brandenburger (1985a), Buhr (1964b), Gäumann (1959a), Heluta, Hayova, Tykhonenko ao (2010a), Klenke & Scholler (2015a), Poelt & Zwetko (1997a), Termorshuizen & Swertz (2011a), Tóth (1994a).