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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 or basionymous. Taxonomic rank: species. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, irregularly shaped, small, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [568-569] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Mediterranean. Continent: Africa, Asia-Temperate (Asia Minor, Central Asia), and Europe. Region(s): Northern Africa, Middle Asia, and Western Asia. Country or state(s): Balearic Islands, Portugal, Spain (incl. Andorra & Monaco), Greece (and Cyprus), European Turkey, and Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia]; Algeria and Sudan; Iran (and Israel, Lebanon, all Central Asia), Lebanon-Syria, and Turkey (excl. European Turkey).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Chrozophora tinctoria (L.) A Juss.; Chrozophora, Euphorbiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups or gregarious, (.13)-.16-.2-(.275) mm in diam.. Margin: External filaments present; interlaced with each other or interwoven with surrounding mycelium, mycelioid, straight, .8-1 µm long, hyaline, numerous, growing all across the lower half of the ascocarp, smooth or rough, thin, not ramified or ramified (frequently irregularly branched), irregular, septate.

Asci: Distinctly stipitate, 60-125 µm long, (20)-25-35-(40) µm wide; dehiscence unitunicate (numerous).

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid or ovoid, 20-40-(50) µm long, 14-20-(25) µm wide; septa absent.

Conidiophores: Oidiopsis-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, broadly ellipsoid (primary conidia), or cylindrical; macroconidial (two types, primary and secondary conidia), not branched, (35)-45-60-(70) µm long, 12-24 µm wide; aseptate.

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