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Erysiphe scholzii U. Braun & Bolay

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Schubert K. @EXCL@ Kainz C. (06-09-07).

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

Type Information: Basionym: Erysiphe scholzii U. Braun & Bolay. Type: Erysiphe scholzii U. Braun & Bolay.

Taxonomic Literature: Taxonomic notes: + hyphae superficial, branched, hyaline, smooth, 2-7 µm wide; appressoria usually lobed or multilobed, 5-8 µm; ascomata outer wall cells irregularly polygonal, 10-25 (-30) µm diam. Bolay A., Cryptogamica Helvetica 20: 1-176 [71] (2005).

Biogeography: Continent: Asia-Temperate and Europe. Region(s): Middle Europe and China. Country or state(s): Switzerland (incl. Liechtenstein).

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Incarvillea olgae Regel; Incarvillea, Bignoniaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular (subglobose), forming independently from the host thallus or mycelium, scattered or mostly in loose groups, .07-.15 mm in diam.. Margin: External filaments present (0.5-3 times as long as the cleistothecial diam.; somewhat irregular with swellings and constrictions); mycelioid, straight, 3-10 µm in diameter, hyaline or pigmented (coloured at the base), numerous, growing all across the lower half of the ascocarp, flexuose, smooth, thin or moderatly thick (at the base), not ramified, not branched, septate.

Asci: 3-6 asci per ascocarp, cylindrical (ellipsoid-fusiform), not stipitate or distinctly stipitate, 40-60 µm long, 25-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 per ascus, spores 3-5 per ascus, ellipsoid or ovoid, (15)-18-25 µm long, (8)-10-16 µm wide; septa absent; wall hyaline.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched (basal cells straight, sometimes flexuous, cylindrical, followed by 1-2(-3) cells of the same length or somewhat shorter); basal cells 15-30 µm long, 6-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, obovoid (primary conidia), doliiform, or cylindrical; macroconidial (l/w ratio 1.5-3; germ tubes apical, short, with lobed appressoria), not branched, 25-35-(40) µm long, 10-18 µm wide; aseptate; cell wall hyaline; without distinct fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)

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