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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. (06-03-27); revised.

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

Type Information: Basionym: Erysiphe sedi U. Braun. Type: Erysiphe sedi U. Braun.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells irregularly polygonal to rounded, ca. (5-)10-25(-30) µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [200] (1987); Braun, U. The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate and Europe. Region(s): Far Eastern Asia and China. Country or state(s): Romania, Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine; Japan.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Sedum erythrostictum Miq.; Sedum, Crassulaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, not emerging (often, in the dense mycelium), scattered or gregarious, .09-.15 mm in diam.. Margin: External filaments present; interwoven with surrounding mycelium, mycelioid, straight, .5-2.5 µm long, 5-10 µm in diameter, hyaline or pigmented (later, brown, paler above), few or numerous (not very), 5-20 per mm², growing all across the lower half of the ascocarp, smooth or verrucose, thin, not ramified, septate.

Asci: (3)-4-8 asci per ascocarp, not stipitate or indistinctly stipitate, (45)-50-85 µm long, (35)-40-55-(60) µm wide; dehiscence unitunicate (asci large, broad).

Ascospores: 1–2 to c. 4 per ascus, spores 2-5 per ascus, subglobose or broadly ovoid, (18)-20-26-(30) µm long, (11)-12.5-18-(20) µm wide; septa absent; wall hyaline (or faintly yellow).

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Sub-cylindrical; macroconidial, not branched, 25-36 µm long, 12.5-16 µm wide; aseptate.

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