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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. (06-03-28); revised.

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

Type Information: Basionym: Microsphaera ferruginea Erikss. Type: Microsphaera ferruginea Erikss.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 10-15 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [344] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Europe. Country or state(s): Finland, Sweden, Germany (?), and Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia).

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Verbena ×hybrida Voss; Verbena, Verbenaceae.

Reproduction Strategy: With sexual (and possible asexual) stages (epiphyllous). Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, not emerging (in the dense mycelial layer), scattered, .08-.1 mm in diam.. Margin: External filaments present; not interlaced, straight, 1-2 µm long, hyaline, few, 6-10 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight (sometimes curved), thin or moderatly thick (towards the base), ramified, dichotomously branched (3-4 times, branchings lax, diffuse, tips straight, not recurved), septate.

Asci: 4-10 asci per ascocarp, indistinctly stipitate, 40-55 µm long, 25-35 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 3-8 per ascus, ellipsoid, 16-18 µm long, 10-12 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Macroconidial, not branched, 28-32 µm long, 16-18 µm wide; aseptate.

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