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Data Set Maintenance: Data set compiled and standard item; reviewer(s): Schubert K. (06-01-25); revised.

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

Type Information: Basionym: Microsphaera elevata Burrill. Type: Microsphaera elevata Burrill.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells obscure, irregularly polygonal, ca. 10-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [319] (1987).

Biogeography: Continent: Northern America (USA, Mass. to Ala., Tex., Nebr., N.J.; Canada). Country or state(s): Illinois (USA), Nebraska (USA), Connecticut (USA), Indiana (USA), Massachusetts (USA), New Jersey (USA), Ohio (USA), West Virginia (USA), Texas (USA), Alabama (USA), Mississippi (USA), and District of Columbia (USA).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (mostly) or amphigenous. Host or Phorophyte Taxonomy: Catalpa bignonioides Walter; Catalpa, Bignoniaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or in loose groups, .08-.125 mm in diam.. Margin: External filaments present (long and flaccid); mycelioid or setiform, recurved or straight (tips of the ultimate branchlets knob-like or occasionally slightly recurved), 1-6 µm long, 5-9-(11) µm in diameter, few or numerous, 5-15 per mm², growing more or less between the lower and upper hald of the ascocarp, smooth or faintly rough, thin or somewhat thick (towards the base), not ramified or ramified, dichotomously branched (2-4 times, branchings compact, rather regular, a varying percentage of the appendages always simple, not branched; closely), aseptate or septate (a single septum near the base).

Asci: 4-8 asci per ascocarp, not stipitate or indistinctly stipitate, 40-60 µm long, 30-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (3)-4-5-(6) per ascus, ellipsoid or ovoid, 15-32 µm long, 9-13 µm wide; septa absent.

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