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Erysiphe liriodendri Schwein.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-24); revised.

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

Type Information: Basionym: Erysiphe liriodendri Schwein. Type: Erysiphe liriodendri Schwein.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells obscure, irregularly polygonal, ca. (6-)10-20(-25) µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [199-200] (1987).

Biogeography: Northern hemispheric. Continent: Northern America (USA, widespread). Country or state(s): Connecticut (USA), Indiana (USA), West Virginia (USA), Florida (USA), Georgia (USA), Mississippi (USA), North Carolina (USA), Virginia (USA), and District of Columbia (USA). Checklist records: United States and Canada (continental).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (usually; sometimes covering the entire surface of the leaves) or amphigenous. Host or Phorophyte Taxonomy: Liriodendron tulipifera L.; Liriodendron, Magnoliaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, not emerging (often, in the dense mycelial layer), in loose groups or gregarious, .095-.155 mm in diam.. Margin: External filaments present; interwoven with surrounding mycelium, mycelioid or sometimes setiform, straight, .5-3 µm long, 4-8 µm in diameter, hyaline or pigmented (when mature, brown below and paler above), numerous, growing all across the lower half of the ascocarp or between the lower and upper hald of the ascocarp, stiff and straight (often rather stiff), smooth or rough, thin or moderatly thick (often), not ramified or ramified, sub-dichotomously branched or irregular, septate.

Asci: 4-12 asci per ascocarp, distinctly stipitate, 50-80 µm long, 25-45-(55) µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (3)-4-6 per ascus, ellipsoid or ovoid, 17-30.5 µm long, (8)-10-15 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or more or less cylindrical; macroconidial (conidia length and width measured in dry state; germ tubes on an end, moderately long, simple), not branched, 27-34 µm long, 12.5-16 µm wide; aseptate.

(report generated 04.Okt.2007)

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