Peronospora cephalariae Vincens, 1913
upper side of the leaf with yellow spots. Underside there with a greyish purple down of erect conidiophores that apically several times are branching, each branch ending in an egg-shaped conidium.
Cephalaria alpina, transsylvanica.
Brandenburger (1985a: 597), Klenke & Scholler (2015a).