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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-28). Data set reviewer(s): Schubert K. (06-03-06); revised.

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

Type Information: Basionym: Uncinula vernoniae Viégas. Type: Uncinula vernoniae Viégas.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells obscure;. Braun U., Beih. Nova Hedwigia 89: 1-700 [478-479] (1987).

Biogeography: Continent: Southern America (Brazil, only known from the type collection).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous. Host or Phorophyte Taxonomy: Vernonia polyanthus Less.; Vernonia, Compositae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, .14-.185 mm in diam.. Margin: External filaments present; circinate (later; earlier hooked), .5 µm long, 4-6.5-(8) µm in diameter, hyaline, numerous, 60-100 per mm², growing between the lower and upper hald of the ascocarp or on the upper half of the ascocarp (somewhat in the), smooth, not ramified, aseptate.

Asci: 6-8 asci per ascocarp, 40-50 µm long, 30 µm wide; dehiscence unitunicate (immature).

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid; macroconidial, not branched, 32-40 µm long, 16-20 µm wide; aseptate.

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