Golovinomyces magnicellulatus (U. Braun) V. P. Gelyuta var. magnicellulatus [2000066]

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-02-22); revised.

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

Type Information: Basionym: Erysiphe magnicellulata U. Braun var. magnicellulata. Type: Erysiphe magnicellulata U. Braun var. magnicellulata.

Taxonomic Literature: Taxonomic notes: +conidiophores erect, foot-cells cylindric, followed by 1-3 shorter cells;+appressoria nipple-shaped;+ascocarp outer wall cells conspicuous, shape irregular, rather large, ca. 10-35 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [241-243] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Africa, Asia-Temperate, Australasia, Europe, Northern America (all North America (USA, Canada); furthermore the race on Phlox is introduced in many parts of the world wherever Phlox is grown for ornament (e.g. Australia, Fiji, Egypt, some parts of Africa)), and Pacific. Region(s): Siberia, Far Eastern Asia, Middle Asia, and Australia. Country or state(s): Finland, United Kingdom, Norway, Sweden, Germany, Hungary, Poland, Switzerland (incl. Liechtenstein), Bulgaria, Romania, Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia], Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine; Egypt (and Israel); Japan and Israel & Palestine; Fiji; Ontario (Canada), Oregon (USA), Washington (USA), Iowa (USA), Minnesota (USA), Wisconsin (USA), Connecticut (USA), Indiana (USA), Maine (USA), Massachusetts (USA), Michigan (USA), New Hampshire (USA), New Jersey (USA), New York (USA), Ohio (USA), Pennsylvania (USA), Rhode Island (USA), Vermont (USA), West Virginia (USA), California (USA), Utah (USA), New Mexico (USA), Delaware (USA), Florida (USA), Kentucky (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 (appearance very characteristic, dense, white, persistent patches, often confluent, sometimes covers, leaves often characteristically). Host or Phorophyte Taxonomy: Phlox paniculata L.; Phlox, Polemoniaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, in loose groups or gregarious (the ascocarps often form dense, dark patches or even covers on the host leaves, size variable), .08-.16-(.18) mm in diam.. Margin: External filaments present; interlaced with each other or interwoven with surrounding mycelium, mycelioid, straight, .5-2.5-(4) µm long, (5)-6-10-(12) µm in diameter, hyaline or pigmented (later, brown throughout or paler in the upper part), numerous, growing all across the lower half of the ascocarp or on the upper half of the ascocarp (rarely partly), smooth, thin, not ramified or ramified (rarely), septate.

Asci: 10-25 asci per ascocarp, indistinctly stipitate, 40-85 µm long, 25-50 µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 4 per ascus, spores 2-3-(4) per ascus, subglobose, ellipsoid, or ovoid, (16)-18-29-(31) µm long, 13-20 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; not branched; basal cells (30)-40-80-(110) µm long, 9-13 µm wide. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid or cylindrical; macroconidial (germ tubes arising from an end, relatively short and often more or less clavate), not branched, 26-35 µm long, 14-18 µm wide; aseptate.

(report generated 04.Okt.2007)