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Golovinomyces cichoracearum var. latisporus (U. Braun) U. Braun

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-21). Data set reviewer(s): Schubert K. (06-03-28); not revised (00-08-31).

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: variety. Synonyms: Erysiphe cichoracearum var. latispora U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe cichoracearum var. latispora U. Braun. Type: Erysiphe cichoracearum var. latispora U. Braun.

Taxonomic Literature: Taxonomic notes: This variety differs from var. cichoracearum by the conidial shape and size, see below. Conidia l/w ratio below 2. The ascocarps agree with those of var. cichoracearum.+ascomata outer wall cells irregularly shaped, ca. 8-25 µm diam., occasionally 30 µm;+appressoria nipple-shaped, sometimes with crenulate surface, rarely somewhat lobed, one appressorium per cell or opposite or several in a series;. Braun U., Beih. Nova Hedwigia 89: 1-700 [248-252] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate, Europe (introduced; 3. Asia: introduced), and Northern America (USA, Canada, generallly distributed). Country or state(s): Sweden, Germany, Hungary, Netherlands, Poland, Switzerland (incl. Liechtenstein), Portugal, Bulgaria, Greece, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, European Turkey, Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia], Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine; Japan (introduced); Ontario (Canada), Colarado (USA), Idaho (USA), Montana (USA), Washington (USA), Wyoming (USA), Illinois (USA), Iowa (USA), Kansas (USA), Missouri (USA), North Dakota (USA), Nebraska (USA), South Dakota (USA), Wisconsin (USA), Indiana (USA), Massachusetts (USA), New Jersey (USA), New York (USA), Ohio (USA), Pennsylvania (USA), West Virginia (USA), Utah (USA), New Mexico (USA), Texas (USA), Delaware (USA), Georgia (USA), Maryland (USA), Mississippi (USA), North Carolina (USA), Tennessee (USA), Virginia (USA), and District of Columbia (USA). Checklist records: United States and Canada (continental).

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Helianthus grosseserratus M. Martens; Helianthus, Compositae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.065)-.085-.16-(.2) mm in diam.. Margin: External filaments present; interlaced with each other or interwoven with surrounding mycelium, mycelioid, straight, .5-2-(4) µm long, (3)-4-9-(12) µm in diameter, hyaline or pigmented (later, pale to deep brown throughout, sometimes faintly coloured or brown in the basal half and paler or hyaline in the upper half), numerous, growing all across the lower half of the ascocarp or on the upper half of the ascocarp (rarely some), smooth, thin, not ramified (mostly), septate.

Asci: 5-25 asci per ascocarp, not stipitate or distinctly stipitate (mostly), (35)-50-80-(900) µm long, (20)-25-45-(55) µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 4 per ascus, spores 2-3-(4) per ascus, subglobose, ellipsoid, or ovoid, 18-30 µm long, 11-20 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; not branched. Conidium Formation: Conidiogenous cells in chains. Conidia: Broadly ellipsoid, ovoid, or doliiform; macroconidial, not branched, 28-45 µm long, 18-27 µm wide; aseptate.

(report generated 04.Okt.2007)

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