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Erysiphe ligustri (Homma) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-27). Data set reviewer(s): Schubert K. (06-03-24); revised.

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

Type Information: Basionym: Microsphaera ligustri Homma. Type: Microsphaera ligustri Homma.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells polygonal, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [411-413] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Ligustrum ovalifolium Hassk.; Ligustrum, Oleaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .075-.1 mm in diam.. Margin: External filaments present; recurved (tips of the ultimate branchlets), 1-1.5-2 µm long, 7-10 µm in diameter, hyaline or pigmented (brown at the base, colour usually spread from the base up to the middle of the stalk, paler or yellowish upwards, apical part usually hyaline, rarely coloured throughout), few, 4-11 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight (rather), thin, moderatly thick (throughout or thin-walled above and thick-walled towards the base), or thick, ramified, dichotomously branched (3-5 times, two types, branched part either close and compact, primary branches short, or branchings loose, primary branches elongated, widely forked, sometimes recurved, some appendages deeply cleft, occasionally forked at the very base, tips of the ultimate branchlets recurved), aseptate or septate (with 1-2 septa near the base).

Asci: 3-4-(5) asci per ascocarp, sub-globose (often), not stipitate or indistinctly stipitate (rarely), 45-65 µm long, 35-50 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 4-7-(8) per ascus, subglobose, ellipsoid, or ovoid, 16-26 µm long, 9-15 µm wide; septa absent.

(report generated 04.Okt.2007)

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