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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-26). Data set reviewer(s): Schubert K. (06-03-23); not revised (02-06-12).

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Microsphaera decaisoreae F. L. Tai; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera decaisoreae F. L. Tai. Type: Microsphaera decaisoreae F. L. Tai.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 7-14 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [391-392] (1987).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous. Host or Phorophyte Taxonomy: Decaisnea fargesii Franch.; Decaisnea, Lardizabalaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .098-.126 mm in diam.. Margin: External filaments present; recurved (when mature) or straight, .75-1 µm long, hyaline or pigmented (brown, basal part), few, 5-9 per mm², growing between the lower and upper hald of the ascocarp, thin, moderatly thick, or thick (towards the base), ramified, dichotomously branched (4-5 times regularly, primary branches soometimes elongated, tips recurved when mature), septate (a single septum, away from the base (ca. one-third to one-half)).

Asci: 3-7 asci per ascocarp, not stipitate or indistinctly stipitate, 56-67 µm long, 39-52 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 4-8 per ascus, ellipsoid or ovoid, 22-25-(29) µm long, 11-14 µm wide; septa absent.

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