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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-28); revised.

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

Type Information: Basionym: Microsphaera viciae-unijugae Homma. Type: Microsphaera viciae-unijugae Homma.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells obscure, irregularly polygonal, ca. 8-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [223] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): Siberia, Far Eastern Asia, and China. Country or state(s): Japan.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Vicia unijuga A. Braun; Vicia, Leguminosae-Papilionoideae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups or gregarious, .085-.135-(.145) mm in diam.. Margin: External filaments present (outline very irregular, rather rigid); interlaced with each other (often densely crowded around the ascocarps), mycelioid, straight, 4-8-(9) µm in diameter, hyaline or pigmented (sometimes, yellowish or faintly brown), very numerous, growing all across the lower half of the ascocarp or between the lower and upper hald of the ascocarp (partly), smooth or rough, thin or moderatly thick (throughout), not ramified or ramified (branchings very strongly developed, coral like, about 1-5 times, branched from base to top), sub-dichotomously branched or irregular, aseptate or septate (1-2 septa in the lower half).

Asci: 4-10 asci per ascocarp, not stipitate or indistinctly stipitate, (40)-50-70-(80) µm long, 30-45-(55) µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (3)-4-6-(7) per ascus, ellipsoid or ovoid, 18-25 µm long, 10-15 µm wide; septa absent.

Conidiophores: Pseudoidium-type. Conidium Formation: Conidiogenous cells single. Conidia: Doliiform or cylindrical; macroconidial, not branched, 25-38 µm long, 13-20 µm wide; aseptate.

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