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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. (06-04-05); revised.

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

Type Information: Basionym: Phyllactinia paulowniae Y. N. Yu & S. J. Han. Type: Phyllactinia paulowniae Y. N. Yu & S. J. Han.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, irregularly shaped;. Braun U., Beih. Nova Hedwigia 89: 1-700 [586] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): China (only known from the type collection).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous. Host or Phorophyte Taxonomy: Paulownia imperialis Siebold & Zucc.; Paulownia, Bignoniaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered, .124-.177 mm in diam.. Margin: External filaments present (179-260 µm long); not interlaced, straight, 1.5 µm long, few, 5-8 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, not ramified.

Asci: 7-14 asci per ascocarp, distinctly stipitate, 68-84 µm long, 34-44 µm wide; dehiscence unitunicate.

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid or ovoid, 32-39 µm long, 19-25 µm wide; septa absent.

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