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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. (06-01-26); revised.

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

Taxonomic Literature: Taxonomic notes: +appressoria lobed;+conidiophores foot-cells twisted, 3-5 celled;+ascomata outer´wall cells obscure, irregularly shaped, ca. 5-15 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [572-573] (1987).

Biogeography: Continent: Africa, Asia-Temperate, and Asia-Tropical. Region(s): Southern Africa (South Africa) and China. Country or state(s): Japan, Korea (North & South), and Taiwan; India and Pakistan.

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous. Host or Phorophyte Taxonomy: Celtis chinensis Bunge; Celtis, Ulmaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .2-.4 mm in diam.. Margin: External filaments present (somewhat tapering towards the tip); mycelioid or setiform, uncinate (closely) or circinate, .25-.75 µm long, 4-8 µm in diameter, hyaline, very numerous (densely crowded around the fruit body, also somewhat in the upper half), 100-300 per mm², smooth, thin or thick (often later), not ramified, aseptate.

Asci: 20-60 asci per ascocarp, distinctly stipitate, (60)-70-95-(110) µm long, (20)-25-35-(40) µm wide; dehiscence unitunicate (numerous).

Ascospores: 1–2 or c. 4 per ascus, spores (2)-3-4 per ascus, ellipsoid or ovoid, 25-40 µm long, 12-25 µm wide; septa absent.

Conidiophores: Streptopodium-type; not branched; basal cells 120-240 µm long, 5-7.5 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or clavate (to fusiform; primary conidia more or less lanceolate, pointed apically); macroconidial (primary and secondary conidia), not branched, 35-75 µm long, 14-24 µm wide; aseptate.

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