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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. (06-03-24); revised.

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

Type Information: Basionym: Erysiphe lycopsidis R. Y. Zheng & G. Q. Chen. Type: Erysiphe lycopsidis R. Y. Zheng & G. Q. Chen.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells more or less cylindric, followed by (1-)2(-3) shorter cells;+appressoria lobed;+ascocarp outer wall cells irregularly shaped, ca. 8-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [218] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate and Europe. Region(s): Middle Asia and China. Country or state(s): Denmark, United Kingdom, Norway, Austria, Germany, Poland, Switzerland (incl. Liechtenstein), France (excl. Corsica), Spain (incl. Andorra & Monaco), Bulgaria, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, European Turkey, Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine.

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Lycopsis orientalis L.; Lycopsis, Boraginaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups, (.075)-.095-.125-(.13) mm in diam.. Margin: External filaments present (mostly short); mycelioid, straight, .5-1.5 µm long, (4)-5-8.5-(9) µm in diameter, hyaline or pigmented (brown in the lower half, paler above), numerous, 10-20 per mm², growing all across the lower half of the ascocarp, not ramified, septate.

Asci: (3)-4-8 asci per ascocarp, not stipitate or indistinctly stipitate, (40)-50-70-(80) µm long, (25)-30-50 µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 4 per ascus, spores (2)-3-4-(5) per ascus, ellipsoid or ovoid, (16)-18-24 µm long, 10-15 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched; basal cells 25-45 µm long, 7-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, ovoid, doliiform, or sub-cylindrical; macroconidial (germ tubes on an end, short, apex more or less lobed or shortly forked), not branched, (20)-30-40-(45) µm long, (12.5)-16-22.5-(25) µm wide; aseptate.

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