Peronospora thesii Lagerheim

on Thesium

gall

underside of the leaf with a grey down of erect conidiophores that apically several times are branching dichotomously, each branch ending upon an egg-shaped conidium.

hostplants

Santalaceae, monophagous

Thesium alpinum, pyrenaicum, ramosum.

references

Brandenburger (1985a: 80), Doppelbaur & Doppelbaur (1974a), Klenke & Scholler (2015a), Săvulescu (1948a).