Geranium robertianum, Belgium, prov Limbourg, Lommel, den Tip © Carina Van Steenwinkel: the plants seem dusted with ash

gall

upper surface dark brown erumpant globular perithecia, ± 0.1 mm in size. Mainly on overwintered leaves (Ellis & Ellis).

host plants

Geraniaceae, narrowly monophagous

Geranium robertianum, tuberosum.

synonyms

Hormotheca robertiani (Fries) von Höhnel, 1920; Stigmatea (Fries) Fries, 1849.

references

Blumer (1946a), Brandenburger (1985a: 329), Chevassut (1992a), Doppelbaur & Doppelbaur (1973a), Ellis & Ellis (1997a), Jage, Klenke, Kruse ao (2016a), Jage, Kruse, Kummer ao (2013a), Kirbağ (2004a), Kruse (2019a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a), Negrean (1996b), Ruszkiewicz-Michalska (2006a), Scheuer & Bechter (2012a), Unamuno (1942a).