Betula pendula, from Ruszkiewicz-Michalska & Połeć (2006a); scale bar = 10 µm

gall

roundish, amphigenous, greyish to dark brown leaf spots with a darker centre. Conidiophores unbranched, pale brown, smooth, 20-42 µm. Conidia mostly solitary, pale olivaceous, smooth, 5-6 x 15-27 µm, 0-3-septate.

host plants

Betulaceae, monophagous

Betula pendula, pubescens.

references

Brandenburger (1985a: 54), Ruszkiewicz-Michalska & Połeć (2006a), Schubert, Ritschel & Braun (2003a).