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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-27). Data set reviewer(s): Schubert K. (06-03-24); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: variety. Synonyms: Microsphaera menispermi var. dahurica U. Braun & Y. Nomura; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera menispermi var. dahurica U. Braun & Y. Nomura. Type: Microsphaera menispermi var. dahurica U. Braun & Y. Nomura.

Taxonomic Literature: Taxonomic notes: This variety differs from var. menispermi by a different mode of branching. The branchings are loose and characteristically. Braun U., Beih. Nova Hedwigia 89: 1-700 [411-413] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): Siberia, Far Eastern Asia, and China. Country or state(s): Japan.

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Menispermum dauricum DC.; Menispermum, Menispermaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .09-.12 mm in diam.. Margin: External filaments present; recurved, .75-1.5 µm long, hyaline or pigmented (brown at the base), few or numerous, 4-18 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, smooth or rough (near the base), thin, moderatly thick (throughout or thin-walled above and thick-walled towards the base), or thick, ramified, dichotomously branched (4-6 times, branchings mostly somewhat loose, primary and secondary branches often somewhat elongated, characteristically), aseptate or septate (0-2-septate).

Asci: 4-7 asci per ascocarp, indistinctly stipitate, 45-70 µm long, 35-50 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores (5)-6-7-(8) per ascus, ellipsoid or ovoid, 16-25 µm long, 10-14 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or doliiform; macroconidial (germ tubes at an end, short, irregular), not branched, 30-40 µm long, 15-20 µm wide; aseptate.

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