Botanische Staatssammlung München © 1995–2008
Data remain intellectual property of the data set authors.

Erysiphe friesii (Lév.) U. Braun & S. Takam. var. friesii

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-27). Data set reviewer(s): Schubert K. (06-01-25); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: variety. Synonyms: Microsphaera friesii var. friesii Lev.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera friesii var. friesii Lev. Type: Microsphaera friesii var. friesii Lev.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells straight to curved, rarely flexuous, followed by (1-)2-3 cellls of about the same length (or somewhat shorter or somewhat longer);+appressoria lobed;+ascomata outer wall cells obscure, irregularly polygonal, ca. 8-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [420-422] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate and Europe (widespread from France eastwards to the European part of the USSR and in northern Europe). Region(s): China (northwestern part, and Central Asia). Country or state(s): Denmark, United Kingdom, Norway, Sweden, Austria, former Czechoslovakia (incl. Czech Republic & Slovacia), Germany, Hungary, Poland, Switzerland (incl. Liechtenstein), France (excl. Corsica), 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], Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Rhamnus cathartica L.; Rhamnus, Rhamnaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, (.06)-.08-.105-(.12) mm in diam.. Margin: External filaments present; setiform, recurved (tips of the ultimate branchlets recurved when mature), 1-2 µm long, 8-10.5 µm in diameter, hyaline or pigmented (at the base), few or numerous, 5-12 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight (straight or curved), smooth or rough, thin or thick (towards the base), ramified, dichotomously branched (3-5 times, branches rather close, compact, regular, tips recurved when mature), aseptate or septate (0-1-septate).

Asci: 3-8 asci per ascocarp, not stipitate or indistinctly stipitate, 40-60 µm long, 30-45 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores (2)-3-5 per ascus, subglobose, ellipsoid, or ovoid, 15-21-(24) µm long, 8.5-15 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 15-32.5 µm long, 7.5-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or cylindrical; macroconidial, not branched, 27-40 µm long, 10-16.5 µm wide; aseptate.

(report generated 04.Okt.2007)

In case that additional characters and states are required to be included in this data set, consult the LIAS Instructions to Participants and follow the procedures described there.