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Erysiphe ehretiae (Keissl.) U. Braun & S. Takam. [2002353]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-31). Data set reviewer(s): Schubert K. (06-03-01); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Uncinula ehretiae Keissl.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula ehretiae Keissl. Type: Uncinula ehretiae Keissl.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells curved;+ascomata outer wall cells obscure, polygonal to rounded, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [515-516] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): China (endemic).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Ehretia corylifolia C. H. Wright; Ehretia, Boraginaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, gregarious, (.055)-.07-.1-(.11) mm in diam.. Margin: External filaments present (upper part of the stalk and circinate part mostly slightly enlarged); uncinate (at first loosely, more closely circinate or subhelicloid at maturity), circinate, or sub-helicoid, .5-1 µm long, 4-7.5 µm in diameter, hyaline or pigmented (sometimes faintly yellowish at the very base), few, (3)-5-12-(16) per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, rough, thin or thick (towards the base), not ramified, aseptate or septate (rarely with a single septum at the base).

Asci: 3-7 asci per ascocarp, not stipitate or indistinctly stipitate, 40-55 µm long, 25-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (4)-5-6-(7) per ascus, ellipsoid or ovoid, 16-23 µm long, 10-15 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Cylindrical; macroconidial, not branched, 30-33 µm long, 11-13 µm wide; aseptate.

(report generated 04.Okt.2007)

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