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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 hiratae U. Braun. Type: Oidium hiratae U. Braun.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells cylindric, followed by 1-3 shorter cells;+appressoria nipple-shaped;. Braun U., Beih. Nova Hedwigia 89: 1-700 [608-609] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Northern hemispheric. Continent: Europe. Country or state(s): United Kingdom and Romania.

Ecology: Biotroph; phytopathogenic; growing on leaves (white, thin patches or irregularly effuse), amphigenous. Host or Phorophyte Taxonomy: Catalpa bignonioides Walter; Catalpa, Bignoniaceae.

Conidiophores: Euoidium-type; not branched (erect, straight); basal cells 35-60 µm long, 9-11 µm wide. Conidium Formation: Conidiogenous cells in chains. Conidia: Ovoid or doliiform; macroconidial, not branched, 20-28 µm long, 11-16.5 µm wide; aseptate; without distinct fibrosin body (but maybe present when fresh) fibrosin bodies.

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