Erysiphe pileae U. Braun

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-24); revised.

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

Type Information: Basionym: Erysiphe pileae U. Braun. Type: Erysiphe pileae U. Braun.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells irregularly polygonal, 8-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [194-195] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): Far Eastern Asia and China. Country or state(s): Japan.

Ecology: Biotroph; phytopathogenic; growing on leaves, usually epiphyllous (sometimes covering the entire surface of the leaves) or amphigenous. Host or Phorophyte Taxonomy: Pilea mongolica Wedd.; Pilea, Urticaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, not emerging (in the dense mycelial layer), in loose groups, .08-.115-(.13) mm in diam.. Margin: External filaments present (width subequal throughout or somewhat irregular); mycelioid, straight, (.5)-1-3-(4) µm long, 5-9 µm in diameter, hyaline or pigmented (brown throughout when mature or paler in the upper half, subhyaline at the apex), few or numerous, growing all across the lower half of the ascocarp, smooth or rough, thin, not ramified, septate.

Asci: 3-6 asci per ascocarp, not stipitate (sometimes subsessile) or indistinctly stipitate, 40-65 µm long, 25-45-(50) µm wide; dehiscence unitunicate.

Ascospores: 1–2 or c. 4 per ascus, spores 2-4 per ascus, ellipsoid or ovoid, 15-25 µm long, 9-14 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Doliiform or cylindrical; macroconidial, not branched, 25-36 µm long, 12-20 µm wide; aseptate.

(report generated 04.Okt.2007)