Peronospora silvestris Gäumann, 1981
on Veronica
gall
leaves pale, may be disfigured. Underside with a greyish-violet down, consisting of 0.4 mm high erect conidiophores that apically several times are dichotomously branching, each terminal branch ending in an ovoid conidium.
hostplants
Plantaginaceae, narrowly monophagous
Veronica urticifolia.
synonyms
both Brandenburger and Klenke & Scholler consider this species conspecific with P. grisea. However, the molecular genetic results of Riethmüller ao rather indicate an independent species.
references
Brandenburger (1985a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse (2019a), Riethmüller, Voglmayr, Göker ao.