Erysiphe azaleae (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 azaleae U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.
Type Information: Basionym: Microsphaera azaleae U. Braun. Type: Microsphaera azaleae U. Braun.
Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells irregularly polygonal, ca. 10-25(-30) µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [394] (1987).
Biogeography: Continent: Europe and Northern America (USA, Canada). Country or state(s): Germany; New York (USA), Delaware (USA), and District of Columbia (USA). Checklist records: United States and Canada (continental).
Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Rhododendron nudiflorum (L.) Torr.; Rhododendron, Ericaceae.
Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, .1-.13 mm in diam.. Margin: External filaments present; recurved (tips distinctly recurved, rarely forked in the lower half), 1-1.5-(2) µm long, 6-10 µm in diameter, hyaline, numerous, 10-40 per mm², growing between the lower and upper hald of the ascocarp, flexuose or stiff and straight, thin or thick (towards the base), ramified, dichotomously branched (4-6 times regularly and closely), aseptate or septate (a single septum at the base).
Asci: 4-10 asci per ascocarp, not stipitate or indistinctly stipitate, 35-60 µm long, 30-50 µm wide; dehiscence unitunicate.
Ascospores: c. 4 to c. 8 per ascus, spores 4-6-(7) per ascus, ellipsoid or ovoid, 17-28 µm long, 10-15 µm wide; septa absent.
Conidiomata: Absent resp. not observed.
(report generated 04.Okt.2007)
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