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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K. @EXCL@ Kainz C. (06-01-31).

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

Type Information: Basionym: Microsphaera weigelae Y. Nomura & Tanda. Type: Microsphaera weigelae Y. Nomura & Tanda.

Taxonomic Literature: Taxonomic notes: ascomata outer wall cells irregularly angular, 10-20 × 7,5-12,5 µm. Nomura Y., Taxonomical study of Erysiphaceae of Japan. 1- [130]. Tokyo (1997).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Weigela decora (Nakai) Nakai; Weigela, Caprifoliaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered, .08-.11 mm in diam.. Margin: External filaments present; mycelioid or setiform, recurved (tips of the ultimate branchlets), 100-150 µm long, 7.9-9.5 µm in diameter, hyaline or pigmented (ad basim subbrunneae), few or numerous, 9-16 per mm², growing between the lower and upper hald of the ascocarp, geniculate (bent) (curvatae vel ad medium geniculatae), thin or thick (at the base), ramified, dichotomously branched (4-5 times, regularly), septate or aseptate (1-septate at the base).

Asci: 3-5 asci per ascocarp, globose (ovoid to subglobose), not stipitate, 57-75 µm long, 47-60 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 8 per ascus, ellipsoid, 18-23 µm long, 11-13 µm wide; septa absent.

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