Erysiphe circaeae L. Junell

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-22); revised.

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

Type Information: Basionym: Erysiphe circaeae L. Junell.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells straight, curved or slightly flexuous, nearly cylindric, followed by 1-2 cells, the second cell is shorter, longer or about as long as the foot-cell, the third cell is always shorter than the foot-cell;+appressoria lobed;+ascocarp outer wall cells irregularly polygonal, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [207-208] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate, Australasia, and Europe. Region(s): Far Eastern Asia and Australia (introduced). Country or state(s): Denmark, United Kingdom, Norway, Sweden, Austria, Benelux (Belgium & Luxembourg), former Czechoslovakia (incl. Czech Republic & Slovacia), Germany, Hungary, Netherlands, Poland, Switzerland (incl. Liechtenstein), France (excl. Corsica), Portugal, Spain (incl. Andorra & Monaco), Bulgaria, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia], and Ukraine.

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Circaea lutetiana L.; Circaea, Onagraceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .07-.105 mm in diam.. Margin: External filaments present (rather coarse, very irregularly shaped); mycelioid, straight, .5-3 µm long, 4-9 µm in diameter, hyaline or pigmented (when mature), few, growing all across the lower half of the ascocarp, smooth, thin, not ramified or ramified, irregular, septate.

Asci: (2)-3-5-(6) asci per ascocarp, not stipitate or indistinctly stipitate, 45-65 µm long, 30-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 3-5 per ascus, ellipsoid or ovoid, 18-23 µm long, 10-12 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 25-35 µm long, 6-9 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: More or less ellipsoid; macroconidial, not branched, 30-46 µm long, 14-20 µm wide; aseptate.

(report generated 04.Okt.2007)