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

Erysiphe thesii L. Junell

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-28); revised.

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

Type Information: Basionym: Erysiphe thesii L. Junell. Type: Erysiphe thesii L. Junell.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells cylindric, followed by shorter cells;+appressoria lobed;+ascocarp outer wall cells obscure, irregularly polygonal to rounded, ca. 6-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [197-198] (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): Siberia and Far Eastern Asia. Country or state(s): 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, Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine; Morocco; Japan.

Ecology: Biotroph; phytopathogenic; growing on stems, leaves, inflorescences, or fruits, amphigenous (mycelium often covering the entire surface of the leaves). Host or Phorophyte Taxonomy: Thesium humile Vahl; Thesium, Santalaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups or gregarious, (.075)-.09-.12-(.125) mm in diam.. Margin: External filaments present (rather coarse, straight); straight, 1-4 µm long, 5-10 µm in diameter, hyaline or pigmented (later, at least partly), few, growing all across the lower half of the ascocarp, stiff and straight (rather coarse), thin, not ramified, septate.

Asci: 3-10 asci per ascocarp, indistinctly stipitate, 60-80 µm long, 35-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 3-6 per ascus, ellipsoid or ovoid, 20-23 µm long, 11-15 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 25-35 µm long, 8-9 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or doliiform; macroconidial, not branched, 26-45 µm long, 12.5-19 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.