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Erysiphe magnifica (U. Braun) 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. (06-03-24); revised.

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

Type Information: Basionym: Microsphaera magnifica U. Braun. Type: Microsphaera magnifica U. Braun.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells conspicuous, irregularly polygonal, ca.10-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [399-400] (1987).

Biogeography: Continent: Asia-Temperate and Northern America (USA, Ala., Md., Pa., Wash. D.C.). Country or state(s): Japan and Korea (North & South); Pennsylvania (USA), Alabama (USA), Maryland (USA), and District of Columbia (USA). Checklist records: United States and Canada (continental).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Magnolia acuminata; Magnolia, Magnoliaceae.

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)-.085-.125 mm in diam.. Margin: External filaments present (often enlarged at the very base); circinate, sub-helicoid, or recurved (tips of the ultimate branchlets distinctly, sometimes even circinate or subhelicoid), .75-1.5 µm long, 6-10-(15) µm in diameter, hyaline or pigmented (at the base), few or numerous, 5-18 per mm², growing between the lower and upper hald of the ascocarp, flexuose or stiff and straight, smooth, thin, moderatly thick (throughout or thin-walled above and thick-walled towards the base), or thick, ramified, dichotomously branched (4-6(-7) times regularly branched, ornate, often somewhat loose, primary and sometimes secondary branches somewhat elongated, occasionally deeply cleft, tips of the ultimate branchlets distinctly recurved, sometimes even circinate or subhelicoid), aseptate or septate (0-1-septate).

Asci: 4-6 asci per ascocarp, distinctly stipitate (mostly), 45-65 µm long, 40-55 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores 3-6 per ascus, ellipsoid or ovoid, (16)-20-26 µm long, 10-15 µm wide; septa absent.

(report generated 04.Okt.2007)

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