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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (03-01-21).

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Taxonomic Literature: Taxonomic notes: +appressoria lobed, solitary or in opposite pairs;
+conidiophores foot-cells straight, rarely curved or subgeniculate, cylindric or somewhat wider in the lower part, basal septum sometimes 5-10 µm away from the mycelium, following cells shorter, 2(-4);
+conidia germ tubes with lobed appressoria, longer ones with knob-like appressoria, rarely branched;. Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate (Armenia) and Europe. Country or state(s): United Kingdom and Germany.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Corylaceae.

Conidiophores: Basal cells 20-37-(50) µm long, 6-11 µm wide. Conidium Formation: Conidiogenous cells single or in chains (rarely in short chains (2-4)). Conidia: Ellipsoid (conidia measured in dried state), cylindrical, or ovoid; (24)-25-35-(38.5) µm long, (10)-12-15-(18) µm wide.

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