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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. (06-03-22); revised.

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

Type Information: Basionym: Erysiphe cercidis T. Xu. Type: Erysiphe cercidis T. Xu.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells subdistinct, irregularly polygonal, 8-16 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [193-194] (1987).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous. Host or Phorophyte Taxonomy: Cercis chinensis Bunge; Cercis, Leguminosae-Papilionoideae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered, .065-.1-(.11) mm in diam.. Margin: External filaments present (length variable on the same fruit body; length (20-)60-458(-655) µm, width nearly subequal throughout, slightly narrower upwards); mycelioid, straight, 1-4-(6) µm long, (2.5)-3.5-6-(7.1) µm in diameter, pigmented (brown ín the lower part, paler above), numerous, (5)-11-25 per mm², flexuose (-undulate), smooth or faintly rough, thin, not ramified, aseptate or septate (0-8 septa).

Asci: 3-5-(7) asci per ascocarp, not stipitate or indistinctly stipitate, 33-55 µm long, 29-40 µm wide; dehiscence unitunicate.

Ascospores: 1–2, c. 4, or c. 8 per ascus, spores 2-7 per ascus, subglobose, ellipsoid, or ovoid, 14-20 µm long, 9-13.5 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Sub-cylindrical; macroconidial, not branched, 26.4-35.1 µm long, 13.2-16.5 µm wide; aseptate.

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