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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. (06-07-25); revised.

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

Type Information: Basionym: Oidium riveae I. J. Joshi, A. Saksena & S. B. Saxena. Type: Oidium riveae I. J. Joshi, A. Saksena & S. B. Saxena.

Taxonomic Literature: Taxonomic notes: +hyphae septate, hyaline, 6-8 µm wide. Braun U., Beih. Nova Hedwigia 89: 1-700 [614-615] (1987).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (large, irregular patches, confluent, later often covering the entire leaf surface). Host or Phorophyte Taxonomy: Rivea hypocretariformis; Rivea, Convolvulaceae.

Conidiophores: Euoidium-type; not branched (erect, 3-5-septate, 64-120 x 8-9.5 µm). Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid or ovoid; macroconidial, not branched, 23.5-34.5 µm long, 11.5-16 µm wide; aseptate.

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