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Erysiphe oleosa (R. Y. Zheng & G. Q. Chen) U. Braun & S. Takam. var. oleosa [2000040]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-28). Data set reviewer(s): Schubert K. (06-03-02); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: variety. Erysiphaceae Tul. & C. Tul.; Erysiphales.

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

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal to rounded, ca. (6-)10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [511-513] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): Far Eastern Asia and China. Country or state(s): Japan.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Tilia tuan Szyszył.; Tilia, Tiliaceae.

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-.125 mm in diam.. Margin: External filaments present (width subuniform throughout or slightly increasing upwards (-10 µm), coiled part not enlarged, occasionally even decreasing towards the tip; oil drops often present in the appendages, especially in the upper half); circinate (closely) or sub-helicoid, (1)-1.5-2-(2.5) µm long, 5-8-(10) µm in diameter, hyaline or pigmented (at the base), few or numerous, 8-25 per mm², growing between the lower and upper hald of the ascocarp, flexuose (straight to curved, sometimes abruptly bent), thin or moderatly thick (towards the base), not ramified, septate (usually 1-septate).

Asci: 3-7 asci per ascocarp, not stipitate or indistinctly stipitate, 45-60 µm long, 35-50 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 5-7-(8) per ascus, ellipsoid, ovoid, or sub-cylindrical, (15)-18-25 µm long, 9-15 µm wide; septa absent.

(report generated 04.Okt.2007)

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