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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-08-09). 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.

Type Information: Basionym: Erysiphe lanuginosa Fuckel. Type: Erysiphe lanuginosa Fuckel.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, irregularly shaped, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [565-566] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Africa, Asia-Temperate, Europe, and Asia-Tropical. Country or state(s): Germany, France (excl. Corsica), Portugal, Spain (incl. Andorra & Monaco), Greece (and Cyprus), Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), and European Turkey; Sudan; Uzbekistan, Iran (and Israel, Uzbekistan), and Israel & Palestine; India.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Daucus maximus Desf.; Daucus, Umbelliferae.

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 mycelial felt), in loose groups (rarely) or gregarious, .17-.25 mm in diam.. Margin: External filaments present (often well developed, sometimes scarce); interlaced with each other, mycelioid, straight, .2-.8 µm long, 4-10 µm in diameter, hyaline or pigmented (yellowish), few or numerous, growing all across the lower half of the ascocarp, not ramified or ramified (often irregularly branched), not branched, septate.

Asci: At least 20 asci per ascocarp, narrowly clavate (mostly), distinctly stipitate, 75-100 µm long, 25-35-(40) µm wide; dehiscence unitunicate (very numerous).

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid or ovoid, (25)-30-35-(40) µm long, 15-20-(25) µm wide; septa absent.

Conidiophores: Oidiopsis-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Cylindrical (with cingulum-like rings near the ends); macroconidial, not branched, 40-80 µm long, 13-20 µm wide; aseptate.

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