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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (03-01-16). Data set not revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Microsphaera tiliae Eliade; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Taxonomic Literature: Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Ecology: Growing on leaves, hypophyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Tiliaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, scattered, .08-.14 mm in diam.. Margin: External filaments present (straight to curved); .5-1 µm long, 9-12 per mm², growing between the lower and upper hald of the ascocarp, ramified, dichotomously branched (2-5 times, branches close, regular, primary branches short, tips of the ultimate branchlets straight or somewhat recurved).

Asci: 5-6 asci per ascocarp, sub-globose, 35-50 µm long, 30-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 4-6 per ascus, ellipsoid, 8-18 µm long, 5-16 µm wide.

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