unknown on Prunus spinosa

erineum on Prunus spinosa

Prunus spinosa, France, dép. Essonne, Buno-Bonnevaux, 15.vi.2019 © Pierre Duhem

erineum on Prunus spinosa

another leaf.

parasite

Blood red, epiphyllous erineum, independent of the leaf margin or venation.

host plants

Rosaceae

Prunus spinosa.

mod 15.xi.2019