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Erysiphe rorippae G. Q. Chen & R. Y. Zheng

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

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

Type Information: Basionym: Erysiphe rorippae G. Q. Chen & R. Y. Zheng. Type: Erysiphe rorippae G. Q. Chen & R. Y. Zheng.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells irregularly polygonal, 7.1-20.3 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [190] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): China (Xiangshan, Beijing, only known from the type collection).

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, mostly epiphyllous or amphigenous. Host or Phorophyte Taxonomy: Rorippa cantoniensis (Lour.) Ohwi; Rorippa, Cruciferae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, gregarious, .09-.128 mm in diam.. Margin: External filaments present (substraight to curved, often tortuous, flexuous, undulate to geniculate; length (20-)60-230(-325) µm, width subuniform or often slightly enlarged or subclavate at the apex); straight, (.25)-.6-2-(3) µm long, 5.1-8.9 µm in diameter, hyaline or pigmented (rarely yellowish or brownish below), numerous, 11-32 per mm², growing all across the lower half of the ascocarp, flexuose, stiff and straight (substraigth to curved, often tortuous), or geniculate (bent) (undulate to), sub-verrucose (throughout), thin or moderatly thick (towards the base), not ramified or ramified, not branched, aseptate or septate (0-2(-5)-septate).

Asci: 4-6-(7) asci per ascocarp, not stipitate (subsessile) or indistinctly stipitate, 53.3-81.3 µm long, 30.5-40.6-(48.3) µm wide; dehiscence unitunicate (thin-walled, fragile).

Ascospores: 1–2 or c. 4 per ascus, spores 2-4 per ascus, ovoid (sometimes pointed at both ends), (20.3)-25.4-33 µm long, (12.2)-13.9-17.8 µm wide; septa absent; wall pale brown (pale yellow).

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: More or less cylindrical; macroconidial, not branched, 25.4-45.7 µm long, 10.2-17.8 µm wide; aseptate.

(report generated 04.Okt.2007)

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