Uromyces cristulatus Tranzschel, 1910on Euphorbia
gall
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.
hostplants
Euphorbiaceae, narrowly monophagous
Euphorbia petrophila, seguieriana.
notes
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.
references
Brandenburger (1985a), Buhr (1964b), Gäumann (1959a), Heluta, Hayova, Tykhonenko ao (2010a), Klenke & Scholler (2015a), Poelt & Zwetko (1997a), Termorshuizen & Swertz (2011a), Tóth (1994a).
08/12/2016