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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-08-02). Data set reviewer(s): Schubert K. (06-04-04); revised.

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

Type Information: Basionym: Phyllactinia broussonetiae-kaempferi Sawada. Type: Phyllactinia broussonetiae-kaempferi Sawada.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure;. Braun U., Beih. Nova Hedwigia 89: 1-700 [583] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): China. Country or state(s): Japan.

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous (usually) or amphigenous. Host or Phorophyte Taxonomy: Broussonetia kaempferi Siebold; Broussonetia, Moraceae.

Reproduction Strategy: With sexual (and possible asexual) stages (hypophyllous). Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, (.155)-.175-.275-(.32) mm in diam.. Margin: External filaments present (basal swelling ca. 35-50 µm diam.); not interlaced, straight, 1-2.5 µm long, few or numerous, 6-14 per mm², stiff and straight, not ramified.

Asci: 10-25 asci per ascocarp, distinctly stipitate, 65-105 µm long, 30-45 µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 4 per ascus, spores (2)-3-4 per ascus, broadly ellipsoid or ovoid, 30-45 µm long, 14-30 µm wide; septa absent.

Conidiophores: Ovulariopsis-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: More or less clavate; macroconidial, not branched, 45-85 µm long, 23-40 µm wide; aseptate.

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