Uromyces cristulatus Tranzschel, 1910

on 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

mod 22.xi.2017