Erysiphe gracilis R. Y. Zheng & G. Q. Chen

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-01-25); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Synonyms: Erysiphe hiratae U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe gracilis R. Y. Zheng & G. Q. Chen. Type: Erysiphe gracilis R. Y. Zheng & G. Q. Chen.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells irregularly polygonal, 8-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [222-223] (1987).

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

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous (usually) or amphigenous. Host or Phorophyte Taxonomy: Cyclobalanopsis glauca (Thunb.) Oerst.; Cyclobalanopsis, Fagaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .08-.11-(.12) mm in diam.. Margin: External filaments present (uniformly narrow); mycelioid, straight, .5-4 µm long, 2.5-5.5 µm in diameter, hyaline or pigmented (yellowish, seldom faintly brown), numerous, 10-20 per mm², growing all across the lower half of the ascocarp, flexuose, smooth or rough, thin or thick (in the lower part), not ramified or ramified, irregular, aseptate or septate (sometimes with few inconspicuous septa).

Asci: 3-9 asci per ascocarp, not stipitate or indistinctly stipitate, 40-65 µm long, 24-45-(50) µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores (3)-5-7 per ascus, ellipsoid or ovoid, 18-26.5 µm long, 11-15 µm wide; septa absent; wall thin, remaining hyaline, hyaline, not ornamented.

Conidiomata: Absent resp. not observed.

(report generated 04.Okt.2007)