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Erysiphe euphorbiacearum (R. Y. Zheng & G. Q. Chen) U. Braun & S. Takam. [2001423]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-28). Data set reviewer(s): Schubert K. (06-03-01); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Uncinula euphorbiacearum R. Y. Zheng & G. Q. Chen; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula euphorbiacearum R. Y. Zheng & G. Q. Chen. Type: Uncinula euphorbiacearum R. Y. Zheng & G. Q. Chen.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, polygonal, ca. 7.6-17.8 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [485] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): China (only known from the type collection).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous. Host or Phorophyte Taxonomy: Alchornea davidii Franch.; Alchornea, Euphorbiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .09-.13 mm in diam.. Margin: External filaments present (straight to curved, about as long as the cleistothecial diam. or somewhat shorter); uncinate or circinate (close), .8-1 µm long, 5.1-8.9-(10.2) µm in diameter, hyaline or pigmented (rarely at the base), numerous, 11-21-(36) per mm², growing between the lower and upper hald of the ascocarp, smooth, thin (throughout), aseptate or septate (0-1-septate).

Asci: 4-8 asci per ascocarp, not stipitate or indistinctly stipitate, 43.2-76.2 µm long, 38.1-53.5 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 4-5-(6) per ascus, ovoid (oblong-), 18.9-25.4 µm long, 11.4-16.9 µm wide; septa absent.

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