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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 hemidesmi Suj. Singh & Kamal. Type: Oidium hemidesmi Suj. Singh & Kamal.

Taxonomic Literature: Taxonomic notes: +hyphae septate, branched, decumbent or creeping, 1.5-4 µm wide; status of this taxon uncertain, small size of the conidia is very unusual for a powdery mildew. Braun U., Beih. Nova Hedwigia 89: 1-700 [608] (1987).

Ecology: Biotroph; phytopathogenic; growing on leaves (effuse or patches, white, superficial). Host or Phorophyte Taxonomy: Hemidesmus indicus; Hemidesmus, Asclepiadaceae.

Conidiophores: Not branched (arising vertically from the superficial hyphae, cylinndric, 2-3-septate, 30.5-90 x 2.5-8 µm). Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid, oblong-obtuse, doliiform, or cylindrical (sometimes); macroconidial, not branched, 10-30 µm long, 6-10.5 µm wide; aseptate.

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