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

Type Information: Basionym: Oidium perseae-americanae Liberato & R.W. Barreto. Type: Oidium perseae-americanae Liberato & R.W. Barreto.

Taxonomic Literature: Taxonomic notes: + superficial hyphae branched, septate, hyaline, flexuous, 2.5-6.5 µm wide; mycelial appressoria lobed. Liberato, J.R. & Barreto, R.W., Mycotaxon 98: 189-192 (2006).

Ecology: Biotroph; phytopathogenic; growing on leaves, hypophyllous. Host or Phorophyte Taxonomy: Persea americana Mill.; Persea, Lauraceae.

Conidiophores: Pseudoidium-type; not branched (cylindrical, hyaline, smooth, 0-2-septate, foot-cell followed by 0-2 shorter cells); conidiophore cells 45-75 µm long, basal cells 27.5-50 µm long, 6.5-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ovoid, doliiform, or cylindrical; macroconidial (l/w ratio 1.5-3.2, smooth; a single germ tube per conidium, up to 1x the length of the conidium, lobed appressorium), not branched, 27.5-40 µm long, 10-20 µm wide; aseptate; cell wall hyaline; without distinct fibrosin body fibrosin bodies.

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