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Erysiphe sp.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set revised @EXCL@ not revised (02-03-14).

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

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells irregularly polygonal, ca. 6-25 µm in diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [189] (1987).

Biogeography: Continent: Northern America (USA).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Corylaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .08-.12 mm in diam.. Margin: External filaments present; setiform ("lower part rather stiff, not mycelium-like"), 1-4 µm long, 4-8-(11) µm in diameter, pigmented (at least in the lower part, yellowish to brownish), growing more or less between the lower and upper hald of the ascocarp (horizontally spread), smooth or rough, thin (throughout; 2: near the base) or moderatly thick, not ramified, septate (few septa).

Asci: 5-10 asci per ascocarp, indistinctly stipitate, 40-65 µm long, 30-40 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6-8 per ascus, subglobose, ellipsoid, or ovoid, 13.5-18.5 µm long, 8-13 µm wide; septa absent; wall thin, remaining hyaline, hyaline, not ornamented.

(report generated 04.Okt.2007)

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