Erysiphe diervillae Miyabe ex U. Braun

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-23); revised.

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

Type Information: Basionym: Erysiphe diervillae Miyabe ex U. Braun.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells indistinct, polygonal, ca. 8-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [184] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on stems, leaves, or fruits. Host or Phorophyte Taxonomy: Weigela hortensis Koch (= Diervilla japonica DC.); Weigela, Caprifoliaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, more or less not emerging (in the dense mycelial layer), (.085)-.11-.16-(.19) mm in diam.. Margin: External filaments present (well developed, very short, differantiation between appendages and hyphae difficult); interlaced with each other or interwoven with surrounding mycelium, straight, .5-1.5 µm long, 5-8 µm in diameter, hyaline, few (sometimes few, poorly developed, very short) or sometimes numerous (number variable), growing all across the lower half of the ascocarp, smooth or faintly rough (below), thin, not ramified, septate (few inconspicuous septa).

Asci: 6-16 asci per ascocarp, not stipitate or distinctly stipitate, 40-85 µm long, 25-55 µm wide; dehiscence unitunicate (shape and size extremely variable).

Ascospores: c. 8 per ascus, spores (5)-6-8 per ascus, ellipsoid or ovoid, 16-36 µm long, 9-17 µm wide; septa absent.

(report generated 04.Okt.2007)