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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Sphaerotheca crotonis (Ponnappa) U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells cylindric;
+ascoc. outer wall cells
obscure, small;. Braun U., Beih. Nova Hedwigia 89: 1-700 [120-121] (1987).

Ecology: Biotroph; phytopathogenic; mostly hypophyllous or amphigenous. Host or Phorophyte Taxonomy: Euphorbiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .095-.12 mm in diam.. Margin: External filaments present; mycelioid, few (rudimentary, very short), growing all across the lower half of the ascocarp, not branched.

Conidiophores: Oidium-type; not branched; basal cells 10-15 µm wide. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid, cylindrical, or ovoid; macroconidial, not branched, 26-36 µm long, 14-18 µm wide; aseptate; with distintly visible fibrosin body fibrosin bodies.

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