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

The description has been generated directly from a database. In cases of errors and insufficiencies consult the corresponding LIAS data entry and revision forms to make the necessary modifications. Changes will appear in the subsequent update of data entry forms and natural language descriptions. [To verify the actual status of the pages, select the reload frame function in the context menu!]
These pages are XHTML compatible designed. May be that problems arise with older web browser versions.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-21). Data set reviewer(s): Schubert K. (06-03-28); not revised (00-08-31).

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Erysiphe cichoracearum var. fischeri (S. Blumer) U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe fischeri S. Blumer. Type: Erysiphe fischeri S. Blumer.

Taxonomic Literature: Taxonomic notes: This variety differs from var. cichoracearum by the stucture of conidiophores, they are curved in the basal half. The ascocarps are very large, see below.+conidiophores curved in the basal half;+ascomata outer wall cells irregularly shaped, ca. 8-25 µm diam., occasionally 30 µm;+appressoria nipple-shaped, sometimes with crenulate surface, rarely somewhat lobed, one appressorium per cell or opposite or several in a series;. Braun U., Beih. Nova Hedwigia 89: 1-700 [248-252] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Africa, Asia-Temperate, and Europe. Region(s): Northern Africa. Country or state(s): Denmark, Finland, United Kingdom, Sweden, Austria, former Czechoslovakia (incl. Czech Republic & Slovacia), Germany, Hungary, Netherlands, Poland, Switzerland (incl. Liechtenstein), Balearic Islands, Corsica (France), France (excl. Corsica), Portugal, Spain (incl. Andorra & Monaco), Bulgaria, Romania, European Turkey, Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia], Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine; Canary Islands (Spain); Kazakhstan.

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Senecio vulgaris L.; Senecio, Compositae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .12-.16 mm in diam.. Margin: External filaments present; interlaced with each other or interwoven with surrounding mycelium, mycelioid, straight, .5-2-(4) µm long, (3)-4-9-(12) µm in diameter, hyaline or pigmented (later, pale to deep brown throughout, sometimes faintly coloured or brown in the basal half and paler or hyaline in the upper half), numerous, growing all across the lower half of the ascocarp, smooth, thin, not ramified (mostly), septate.

Asci: 5-25 asci per ascocarp, not stipitate or distinctly stipitate (mostly), (35)-50-80-(90) µm long, (20)-25-45-(55) µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 4 per ascus, spores 2-3-(4) per ascus, subglobose, ellipsoid, or ovoid; septa absent.

Conidiophores: Euoidium-type; not branched (curved in the basal half). Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid or ovoid; macroconidial, not branched; aseptate.

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.

LIAS Home