Erysiphe euphorbiae Peck

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-23); revised.

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

Type Information: Basionym: Erysiphe euphorbiae Peck. Type: Erysiphe euphorbiae Peck.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells obscure, irregularly polygonal to roounded, ca. 8-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [212] (1987).

Biogeography: Continent: Northern America (USA) and Southern America (doubtful). Country or state(s): New York (USA) and North Carolina (USA); Puerto Rico and Venezuela. Checklist records: United States and Canada (continental).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Euphorbia hypericifolia L.; Euphorbia, Euphorbiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .065-.1 mm in diam.. Margin: External filaments present; mycelioid, straight, 1-6 µm long, 4-9 µm in diameter, hyaline or pigmented (brown throughout when mature, long appendages sometimes paler or hyaline in the upper half), few or numerous, 4-25 per mm², growing all across the lower half of the ascocarp or between the lower and upper hald of the ascocarp, flexuose (-contorted, rather stiff below, coarse), smooth or rough, thin, not ramified, septate (throughout).

Asci: 3-5 asci per ascocarp, not stipitate or indistinctly stipitate, 35-65 µm long, 24-45 µm wide; dehiscence unitunicate.

Ascospores: c. 4 per ascus, spores 3-4 per ascus, ellipsoid or ovoid, 16-24 µm long, 10-15 µm wide; septa absent.

(report generated 04.Okt.2007)