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. Data set reviewer(s): Schubert K. (06-03-24); revised.

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

Type Information: Basionym: Erysiphe knautiae Duby. Type: Erysiphe knautiae Duby.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells cylindric, followed by 1-3 shorter cells, the second cells sometimes as long as the foot-cells, rarely exceeding;+appressoria lobed;+ascocarp outer wall cells polygonal, 8-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [206] (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, very rare). Region(s): Siberia, Far Eastern Asia, Middle Asia, and China. Country or state(s): Denmark, Finland, United Kingdom, Norway, Sweden, Austria, Benelux (Belgium & Luxembourg), former Czechoslovakia (incl. Czech Republic & Slovacia), Germany, Hungary, Poland, Switzerland (incl. Liechtenstein), France (excl. Corsica), Spain (incl. Andorra & Monaco), Bulgaria, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, European Turkey, Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia], Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine; Japan.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous (irregular patches or often covering the entire surface of the leaves). Host or Phorophyte Taxonomy: Knautia arvensis (L.) Coult.; Knautia, Dipsacaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.07)-.075-.105-(.125) mm in diam.. Margin: External filaments present (rather coarse); mycelioid, straight, (.5)-1-4 µm long, 5-10 µm in diameter, pigmented (brown from base to top when mature or brown below and paler above), few (usually), 5-15 per mm², growing all across the lower half of the ascocarp, thin, not ramified, septate.

Asci: (2)-3-6-(8) asci per ascocarp, not stipitate or indistinctly stipitate, 40-70 µm long, 30-50 µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 4 per ascus, spores (2)-3-5 per ascus, ellipsoid or ovoid, (18)-20-30.5 µm long, (8.5)-11-17 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched; basal cells (25)-30-45-(65) µm long, 7-10-(12) µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, ovoid, or sub-cylindrical; macroconidial, not branched, 23-46 µm long, (13)-15-20-(25) µm wide; 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