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Data Set Maintenance: Data set compiled and standard item; reviewer(s): Schubert K. (06-03-23); revised.

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

Type Information: Basionym: Microsphaera coluteae Kom. Type: Microsphaera coluteae Kom.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells irregularly polygonal to rounded, ca. 8-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [302-304] (1987).

Biogeography: Continent: Asia-Temperate (Asia Minor to Central Asia). Region(s): Siberia and China.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Colutea arborescens L.; Colutea, Leguminosae-Papilionoideae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.07)-.08-.145-(.18) mm in diam.. Margin: External filaments present (long and flaccid, often with a tendency to turn towards one direction); interlaced with each other (sometimes), rarely recurved (few slightly) or straight, (2)-3-6-(8) µm long, 5-11 µm in diameter, hyaline or pigmented (sometimes at the very base), numerous, 5-20 per mm², growing more or less between the lower and upper hald of the ascocarp, flexuose (but not mycelioid, not geniculate), smooth or rough (below), thin or moderatly thick (towards the base), not ramified (at first) or ramified, dichotomously branched (1-5 times, branchings very lax, diffuse, often deeply celft, tips not recurved, straight, rarely few tips slightly recurved), aseptate or septate (occasionally with 1(-3) septa).

Asci: (3)-6-15 asci per ascocarp, not stipitate or indistinctly stipitate, 45-75 µm long, 25-45 µm wide; dehiscence unitunicate.

Ascospores: 1–2, c. 4, or c. 8 per ascus, spores (2)-3-6 per ascus, subglobose, ellipsoid, or ovoid, 16-25 µm long, 10-16 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: More or less cylindrical; macroconidial, not branched, 28-38 µm long, 14-17 µm wide; aseptate.

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