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Erysiphe berchemiae (Sawada) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-26). Data set reviewer(s): Schubert K. (06-03-22); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Microsphaera berchemiae Sawada; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera berchemiae Sawada. Type: Microsphaera berchemiae Sawada.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells polygonal to irregularly shaped, ca. 10-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [240] (1987).

Biogeography: Continent: Asia-Temperate. Country or state(s): Japan (endemic).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Berchemia racemosa Siebold & Zucc.; Berchemia, Rhamnaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, (.07)-.115-.12 mm in diam.. Margin: External filaments present (straight to curved); recurved, 1.5-2.5 µm long, 8-12 µm in diameter, hyaline or pigmented (yellowish, brown in the lower half (below the septa)), few or numerous, 4-18 per mm², growing between the lower and upper hald of the ascocarp, smooth or verrucose, thin or thick (towards the base), ramified, dichotomously branched (4-6 times, primary branches mostly elongated, often somewhat recurved), septate (1-6-septate).

Asci: 3-7 asci per ascocarp, indistinctly stipitate, 40-60 µm long, 30-45 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6-8 per ascus, subglobose, ellipsoid, or ovoid, 14-23 µm long, 9-14 µm wide; septa absent.

(report generated 04.Okt.2007)

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