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Podosphaera fuliginea (Schltdl.) U. Braun & S. Takam. var. fuliginea

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: variety. Synonyms: Sphaerotheca fuliginea var. fuliginea (Schltdl. : Fr.) Pollacci; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Alphitomorpha fuliginea Schltdl. : Fr.

Taxonomic Literature: Taxonomic notes: +appressoria indistinct;
+conidiophores foot-cells cylindric,

followed by 2-3 shorter cells;
+ascoc. outer wall cells irregular,

large, (10-)15-45 µm diam.;.
Braun U., Beih. Nova Hedwigia 89: 1-700 [134-135] (1987); Braun U., The powdery mildews (Erysiphales) of Europe.- 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate, Europe, and Northern America (USA, Canada). Region(s): Siberia and Far Eastern Asia.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Scrophulariaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious (mostly dense groups, together with coloured hyphae forming dark patches on the leaves), (.055)-.06-.085-(.095) mm in diam.. Margin: External filaments present (rather coarse); mycelioid (with constrictions; width and shape irregular), .5-4.5 µm long, 3-9 µm in diameter, hyaline or pigmented (brown when mature, long appendages sometimes paler or hyaline in the upper half), few or numerous, growing all across the lower half of the ascocarp, smooth, thin, not ramified or ramified (sometimes), irregularly not branched, septate.

Asci: 1 asci per ascocarp, 50-80 µm long, 50-65 µm wide; dehiscence unitunicate.

Ascospores: c. 8 (ascospores early developed, large) per ascus, spores 6-8 per ascus, broadly ellipsoid or ovoid (or oblong), 18-27 µm long, 11-18.5 µm wide; septa absent; wall thin, remaining hyaline, hyaline, not ornamented.

Conidiomata: Present; hyphomycetous (conidiophores straight, foot cells cylindric).

Conidiophores: Oidium-type; basal cells 45-95 µm long, 9.5-12 µm wide. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid, ovoid, or doliiform; macroconidial, not branched, 24-35 µm long, 15-19 µm wide; aseptate; with distintly visible fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)

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