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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. (06-07-26); revised.

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

Type Information: Basionym: Oidium vernoniae A. K. Saxena & S. B. Saksena. Type: Oidium vernoniae A. K. Saxena & S. B. Saksena.

Taxonomic Literature: Taxonomic notes: +hyphae 3-6.5 µm wide. Braun U., Beih. Nova Hedwigia 89: 1-700 [617] (1987).

Ecology: Biotroph; phytopathogenic; growing on leaves. Host or Phorophyte Taxonomy: Vernonia divergens; Vernonia, Compositae.

Conidiophores: Pseudoidium-type; not branched (erect, cylindric, 2-5-septate, 70-120 x 3.5-7 µm). Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or cylindrical; macroconidial, not branched, 21.5-26.2 µm long, 11.5-15 µm wide; aseptate.

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