Podosphaera viburni U. Braun

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

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

Type Information: Basionym: Podosphaera viburni U. Braun.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells conspicuous, polygonal to rounded, ca. 8-18 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [156-157] (1987).

Biogeography: Continent: Asia-Temperate. Country or state(s): Japan (endemic).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous (infections very inconspicuous). Host or Phorophyte Taxonomy: Viburnum wrightii Miq.; Viburnum, Caprifoliaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .055-.075 mm in diam.. Margin: External filaments present (curved); distinctly recurved (when mature), 1-1.5 µm long, 6-10 µm in diameter, hyaline or pigmented (brown, only at the base), few, 4-12 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, smooth, thin (above) or thick (towards the base), not ramified, dichotomously branched (usually 4-5 times, close to loose, sometimes primary branches elongated), aseptate or septate (0-1).

Asci: 1 asci per ascocarp, sub-globose, not stipitate, 40-50 µm long, 40-50 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 7-8 per ascus, ellipsoid or ovoid, 17-29 µm long, 10-15 µm wide; septa absent.

(report generated 04.Okt.2007)