Erysiphe bulbouncinula U. Braun & S. Takam. [2000167]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-31). Data set reviewer(s): Schubert K. (06-02-22); revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Erysiphe bulbouncinula U. Braun & S. Takam. Synonyms: Bulbouncinula bulbosa (F. L. Tai & C. T. Wei) R. Y. Zheng & G. Q. Chen; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Uncinula clintonii var. bulbosa F. L. Tai & C. T. Wei. Type: Uncinula clintonii var. bulbosa F. L. Tai & C. T. Wei.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 5-15 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [550-551] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): China (only known from the type collection).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous. Host or Phorophyte Taxonomy: Koelreuteria paniculata Laxm.; Koelreuteria, Sapindaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .09-.125 mm in diam.. Margin: External filaments present (two types: long Uncinula-like appendages (see description below) and short appendages arising from the upper half of the ascocarps (capitate cells), numerous, about 18-26.5 x 5-12 µm, thin-walled, more or less capitate, apical part amber-coloured and irregularly shaped); uncinate, circinate, or sub-helicoid, 1-1.5 µm long, 5-11.5 µm in diameter, hyaline or pigmented (distinctly coloured at the base, brown), few, 6-13 per mm², growing between the lower and upper hald of the ascocarp (appendages distinctly bulbous at the base; otherwise increasing in width from base to top), thin or thick (towards the base), not ramified, septate.

Asci: 7-9 asci per ascocarp, not stipitate or indistinctly stipitate, 40-60 µm long, 30-45 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 6-8 per ascus, ellipsoid or ovoid, 16-23-(27) µm long, 9.5-13 µm wide; septa absent.

(report generated 04.Okt.2007)