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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-08-01). Data set reviewer(s): Schubert K. (06-07-24); revised.

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

Type Information: Basionym: Oidium boroniae Crooks. Type: Oidium boroniae Crooks.

Ecology: Biotroph; phytopathogenic; growing on inflorescences (white, forming dense networks on the surface of the petals). Host or Phorophyte Taxonomy: Boronia megastigma Nees ex Bartl.; Boronia, Rutaceae.

Conidiophores: Pseudoidium-type; not branched (erect, 6.5-9 µm wide). Conidium Formation: Conidiogenous cells single. Conidia: More or less ovoid (mostly); macroconidial, not branched, 19-38 µm long, 11-18 µm wide; aseptate.

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