Peronospora silvestris Gäumann, 1981
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.
Plantaginaceae, narrowly monophagous
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.
Brandenburger (1985a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Riethmüller, Voglmayr, Göker ao.