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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-01-24); revised.

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

Type Information: Basionym: Erysiphe aquilegiae var. aquilegiae DC. Type: Erysiphe aquilegiae var. aquilegiae DC.

Taxonomic Literature: Taxonomic notes: +appressoria lobed;+conidiophores foot-cells cylindric, straight, followed by 0-2 shorter cells or cells of about the same length, second cells occasionally longer;+ascocarp outer wall cells irregularly polygonal, ca. 8-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [208-210] (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, and Southern America (USA, Canada, Alaska, Mexico; 4,7,1: introduced). Country or state(s): Denmark, Finland, United Kingdom, Norway, Sweden, Austria, former Czechoslovakia (incl. Czech Republic & Slovacia), Germany, Hungary, Netherlands, Poland, Switzerland (incl. Liechtenstein), France (excl. Corsica), Bulgaria, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia], Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine.

Ecology: Biotroph; phytopathogenic; growing on stems, leaves, or petioles (sometimes), amphigenous. Host or Phorophyte Taxonomy: Aquilegia vulgaris L.; Aquilegia, Ranunculaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.065)-.075-.115-(.125) mm in diam.. Margin: External filaments present (rather coarse, horizontally spread, rather straight or somewhat undulate-geniculate); mycelioid, straight, (1)-3-12 µm long, (3.5)-4.5-9-(10) µm in diameter, pigmented (brown throughout when mature, or paler upwards), few or numerous (number variable), (4)-10-30-(50) per mm², growing at the ascocarp base, all across the lower half of the ascocarp, or between the lower and upper hald of the ascocarp, flexuose or geniculate (bent) (rather straight or somewhat undulate-geniculate), smooth or faintly rough (sometimes), thin, not ramified or ramified, sub dichotomously branched (occasionally, 1(-2)-times), septate.

Asci: (2)-3-8-(12) asci per ascocarp, not stipitate or indistinctly stipitate, 40-70-(80) µm long, 25-45-(55) µm wide; dehiscence unitunicate.

Ascospores: 1–2, c. 4, or c. 8 per ascus, spores (2)-3-5-(6) per ascus, ellipsoid or ovoid, 16-25.5 µm long, 9-15 µm wide; septa absent; wall thin, hyaline (or faintly yellowish).

Conidiophores: Pseudoidium-type; not branched; basal cells (15)-20-38 µm long, 7-11 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, ovoid, or sub-cylindrical; macroconidial (germ tubes usually on an end, short to moderately long, simple or terminating with a lobed appressorium), not branched, (25)-28-50 µm long, (12)-18-22-(24) µm wide; aseptate.

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