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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-27). Data set reviewer(s): Schubert K. (06-03-24); revised.

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

Type Information: Basionym: Microsphaera nemopanthis Peck. Type: Microsphaera nemopanthis Peck.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells polygonal, conspicuous, ca. 10-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [418] (1987).

Biogeography: Northern hemispheric. Continent: Northern America (USA: Ala., Fla., Ill., N.C., N.Y., Pa., Wisc.; Canada). Country or state(s): Illinois (USA), Wisconsin (USA), New York (USA), Ohio (USA), Pennsylvania (USA), Alabama (USA), Florida (USA), and North Carolina (USA). Checklist records: United States and Canada (continental).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Nemopanthus mucronata (L.) Trel.; Nemopanthus, Aquifoliaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .085-.125 mm in diam.. Margin: External filaments present (often enlarged at the very base); recurved, .75-1.5 µm long, 7-10 µm in diameter, hyaline or pigmented (brown at the base, occasionally coloured in the lower half, paler upwards), few or numerous, 6-16 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight (straight to curved), smooth or rough, thin, moderatly thick (throughout or thin-walled above and thick-walled towards the base), or thick, ramified, dichotomously branched (3-5 times, branchings rather loose, primary branches often elongated, sometimes deeply cleft, forked in the lower half, tips recurved), aseptate or septate (a single septum at the base).

Asci: 3-8 asci per ascocarp, not stipitate or indistinctly stipitate, 35-50 µm long, 25-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 5-8 per ascus, subglobose, ellipsoid, ovoid, or sub-cylindrical, 15-20 µm long, 9-15 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or doliiform; macroconidial, not branched, 25-35 µm long, 12-18 µm wide; aseptate.

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