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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); not revised (00-08-08).

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: variety. Synonyms: Microsphaera vanbruntiana var. sambuci-racemosae U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera vanbruntiana var. sambuci-racemosae U. Braun. Type: Microsphaera vanbruntiana var. sambuci-racemosae U. Braun.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells straight, cylindric, followed by two shorter cells, sometimes by a longer and a shorter cell;+appressoria lobed;+ascomata outer wall cells irregularly polygonal, ca. 10-20 µm diam.;see differences in ascomata characters. Braun U., Beih. Nova Hedwigia 89: 1-700 [337-339] (1987).

Biogeography: Continent: Asia-Temperate and Europe (introduced). Region(s): Siberia and Far Eastern Asia. Country or state(s): Finland, Norway, Sweden, Austria, Germany, Poland, Switzerland (incl. Liechtenstein), France (excl. Corsica), Bulgaria, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine; Japan.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Sambucus racemosa L.; Sambucus, Caprifoliaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .085-.16 mm in diam.. Margin: External filaments present; setiform, straight, 1-1.5 µm long, 6.5-11.5 µm in diameter, hyaline or pigmented (at the base, sometimes), very numerous, (10)-15-25-(45) per mm², growing between the lower and upper hald of the ascocarp, smooth or somewhat rough (below), thin or thick (towards the base), ramified, dichotomously branched (4-6 times, branchings close and regular, compact, primary and secondary branches short, the other branches deeply bifurcate, appearance of the branchings digitate, the tips of the ultimate branchlets straight, not recurved, truncate or elongated, narrowed when fully mature), aseptate or septate (0-1-septate).

Asci: (2)-3-8 asci per ascocarp, not stipitate or indistinctly stipitate, 40-70-(80) µm long, 30-50 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 3-6 per ascus, subglobose, ellipsoid, or ovoid, (15)-18-30 µm long, (10)-12-18 µm wide; septa absent.

Conidiophores: Pseudoidium-type; basal cells 18-30 µm long, 7-11 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, doliiform, or cylindrical; macroconidial, not branched, 26-38 µm long, 12-20 µm wide; aseptate.

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