Erysiphe caryae (U. Braun) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-26). Data set reviewer(s): Schubert K. (06-03-22); revised.

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

Type Information: Basionym: Microsphaera caryae U. Braun. Type: Microsphaera caryae U. Braun.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells polygonal, ca. 10-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [380-382] (1987).

Biogeography: Continent: Northern America (USA, widespread).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous (mostly, sometimes epiphyllous (2)), epiphyllous, or amphigenous. Host or Phorophyte Taxonomy: Carya alba Koch; Carya, Juglandaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .07-.1 mm in diam.. Margin: External filaments present; recurved, .75-1.25 µm long, 6-8 µm in diameter, hyaline or pigmented (yellowish, brown at the base), few, 3-9 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight, rough (below), thick (throughout), ramified, dichotomously branched (4-6 times, closely and regularly branched, tips recurved), aseptate or septate (a single septum at the base).

Asci: 3-6 asci per ascocarp, not stipitate or indistinctly stipitate, 45-55 µm long, 35-55 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores (4)-5-6-(7) per ascus, ellipsoid or ovoid, 16-24 µm long, 10-14 µm wide; septa absent.

(report generated 04.Okt.2007)