Peronospora valerianae Trail, 1889
on Valeriana
gall
leaves with pale spots. Underside with a greyish-violet down, consisting of erect conidiophores that apically several times are dichotomously branching, each terminal branch ending upon an ovoid conidium.
hostplants
Caprifoliaceae, monophagous
Valeriana dioica, officinalis, tripteris.
references
Brandenburger (1985a), Doppelbaur & Doppelbaur (1974a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), SÄvulescu (1948a).