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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. (06-03-29); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Erysiphe sparsa U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe sparsa U. Braun. Type: Erysiphe sparsa U. Braun.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly shaped, ca. 8-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [259-260] (1987).

Biogeography: Northern hemispheric. Continent: Northern America (USA). Country or state(s): Wisconsin (USA).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Acalypha virginica L.; Acalypha, Euphorbiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered, .09-.13 mm in diam.. Margin: External filaments present; interlaced with each other, mycelioid, straight, .5-1.5 µm long, 4-11 µm in diameter, hyaline or pigmented (yellowish to brown, at least below), numerous, growing all across the lower half of the ascocarp, smooth, thin, not ramified, septate.

Asci: 8-15 asci per ascocarp, distinctly stipitate, 60-80 µm long, (25)-30-40 µm wide; dehiscence unitunicate.

Ascospores: 1–2 per ascus, spores 2 per ascus, ellipsoid or ovoid, 20-30 µm long, 10-17 µm wide; septa absent.

Conidiophores: Euoidium-type; not branched. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid, ovoid, doliiform, or cylindrical; macroconidial, not branched, 25-40 µm long, 14-20 µm wide; aseptate.

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