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Erysiphe picrasmae (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. (06-03-24); revised.

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

Type Information: Basionym: Microsphaera picrasmae Sawada. Type: Microsphaera picrasmae Sawada.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells cylindric, followed by two shorter cells;+ascomata outer wall cells obscure, irregularly polygonal, ca. 10-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [402-403] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Picrasma quassioides Benn.; Picrasma, Simaroubaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, (.065)-.08-.11-(.125) mm in diam.. Margin: External filaments present; recurved (tips of the ultimate branchlets), (.5)-1-2 µm long, 6-10 µm in diameter, hyaline or pigmented (at the base), few or numerous, 5-16 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, smooth, thin, moderatly thick (sometimes throughout), or thick, ramified, dichotomously branched (4-6 times, loosely branched, primary and secondary branches often elongated, some appendages with closely branched apical parts, compact, tips of the ultimate branchlets recurved), aseptate or septate (0-1-septate).

Asci: 2-7 asci per ascocarp, not stipitate or indistinctly stipitate, 40-55 µm long, 30-45 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 5-6 per ascus, ellipsoid or ovoid, 15-25 µm long, 10-15 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 23-41 µm long, 6-9 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: More or less ellipsoid; macroconidial, not branched, 26-38 µm long, 15-18 µm wide; aseptate.

(report generated 04.Okt.2007)

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