Podosphaera epilobii (Wallr.) U. Braun & S. Takam.

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

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Sphaerotheca epilobii (Wallr.) Sacc.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Alphitomorpha epilobii Wallr.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells nearly cylindric, long, followed by1-2(-3)
shorter cells, germ tubes arising from an end or a side of the
conidium, either long or characteristically short, broadened,
geniculate, but not forked;
+ascocarps outer wall cells irregularly
polygonal, rather large, about 10-30 µm diam., occasionally up
to 35 µm in length;. Braun U., Beih. Nova Hedwigia 89: 1-700 [127-129] (1987).

Biogeography: Continent: Asia-Temperate, Europe, and Northern America (USA, Canada, Alaska). Region(s): Siberia. Country or state(s): Japan.

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Onagraceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious (especially densely gregarious at stems, dense groups of ascocarps together with brown hyphae often forming dark patches or crust-like covers, especially at stems), .06-.105 mm in diam.. Margin: External filaments present; interlaced with each other, mycelioid, .5-5 µm long, (3.5)-4.5-10.5-(12) µm in diameter, hyaline or pigmented (brown thoghout or paler upwards), few or numerous, growing all across the lower half of the ascocarp or on the upper half of the ascocarp (occasionally some appendages), smooth or rough, thin, not ramified, septate.

Asci: 1 asci per ascocarp, (50)-60-80-(100) µm long, (40)-50-70 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6-8 per ascus, ellipsoid or ovoid, (15)-16-24-(26) µm long, 9-16 µm wide; septa absent; wall thin, remaining hyaline, hyaline, not ornamented.

Conidiomata: Present; hyphomycetous.

Conidiophores: Oidium-type; not branched. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid, ovoid, or doliiform; macroconidial, not branched, 19-30 µm long, 13-20 µm wide; aseptate; with distintly visible fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)