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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 cladrastidis Jacz.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera cladrastidis Jacz. Type: Microsphaera cladrastidis Jacz.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells polygonal;. Braun U., Beih. Nova Hedwigia 89: 1-700 [347-348] (1987).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous. Host or Phorophyte Taxonomy: Cladrastis amurensis (Rupr.) Benth. ex Maxim.; Cladrastis, Leguminosae-Papilionoideae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, .075-.09 mm in diam.. Margin: External filaments present (90-110 µm long); straight, 90-110 µm long, few, 7-9 per mm², growing between the lower and upper hald of the ascocarp, ramified, dichotomously branched (4-5 times, regularly branched, tips of the ultimate branchlets not recurved, branchings rather), aseptate.

Asci: 3-5 asci per ascocarp, not stipitate or indistinctly stipitate, 45-50 µm long, 25-28 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6-8 per ascus, 12-14 µm long, 6-7 µm wide; septa absent.

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