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Data Set Maintenance: Data set compiled and standard item; reviewer(s): Schubert K. (06-03-24); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Microsphaera longissima M. Y. Li; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera longissima M. Y. Li. Type: Microsphaera longissima M. Y. Li.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 6-19 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [308-309] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): China (only known from the type collection).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Caragana sinica (Buc'hoz) Rehder; Caragana, Leguminosae-Papilionoideae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .1-.16 mm in diam.. Margin: External filaments present; straight, 5-10 µm long, hyaline or pigmented (at the very base), few, 6-14 per mm², flexuose (and long, turning towards one direction, straight to curved), ramified, dichotomously branched (3-8, mostly 4-7 times, closely and rather regularly branched or somewhat looser, primary branches sometimes elongated, tips of the ultimate branchlets straight, not recurved; rarely (3) trichotomously branched) or trichotomously branched, aseptate or septate (rarely, a single septum near the base).

Asci: 8-25 asci per ascocarp, indistinctly stipitate, 60-90 µm long, 30-53 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 6-8 per ascus, ellipsoid or ovoid, 17.3-26.9 µm long, 8.6-13.5 µm wide; septa absent.

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