Peronospora rubiae Gäumann, 1923

on Rubia

gall

underside of the leaves with a greyish white fungal down, consisting of erect, distally repeatedly dichotomously branched conidiophores. The conidia are egg-shaped.

host plants

Rubiaceae, monophagous

Rubia peregrina, tinctorium.

references

Brandenburger (1985a), Gustavsson (1991a), Klenke & Scholler (2015a).