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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 erysiphoides f. ipomoeae J. M. Yen & Chin C. Wang. Type: Oidium erysiphoides f. ipomoeae J. M. Yen & Chin C. Wang.

Taxonomic Literature: Taxonomic notes: +hyphae branched, septate, 3-8 µm wide; +appressoria multilobed;+conidiophores foot-cells cylindric, followed by 1-2(-3) shorter cells;. Braun U., Beih. Nova Hedwigia 89: 1-700 [610] (1987).

Biogeography: Continent: Asia-Temperate and Asia-Tropical. Country or state(s): Taiwan; India.

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (white, effuse or patches, sometimes covering the entire leaf surface). Host or Phorophyte Taxonomy: Ipomoea obscura (L.) Ker Gawl.; Ipomoea, Convolvulaceae.

Conidiophores: Pseudoidium-type; not branched (erect); basal cells 25-37 µm long, 7-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ovoid, doliiform, or sub-cylindrical; macroconidial, not branched, 29-50 µm long, 14-19 µm wide; aseptate.

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