Erysiphe convolvuli var. calystegiae U. Braun

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-03-23); revised.

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

Type Information: Basionym: Erysiphe convolvuli var. calystegiae U. Braun. Type: Erysiphe convolvuli var. calystegiae U. Braun.

Taxonomic Literature: Taxonomic notes: +appressoria lobed;+conidiophores foot-cells cylindric, followed by 2 shorter cells or cells of about the same length;+ascocarp outer wall cells irregularly polygonal to rounded, ca. 10-25 µm diam.;This variety differs from var. convovuli by asci characters, see below. Braun U., Beih. Nova Hedwigia 89: 1-700 [221-223] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate (Central Asia, Asia Minor) and Europe. Region(s): Middle Asia. Country or state(s): Finland, Austria, Germany, Hungary, Poland, Switzerland (incl. Liechtenstein), France (excl. Corsica), Portugal, Spain (incl. Andorra & Monaco), Bulgaria, Greece, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, European Turkey, Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia], Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine; Iran.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Calystegia sepium (L.) R. Br.; Calystegia, Convolvulaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .09-.155 mm in diam.. Margin: External filaments present; mycelioid, straight, .5-5 µm long, 4-10 µm in diameter, hyaline or somewhat pigmented (in the basal half), numerous, growing all across the lower half of the ascocarp, smooth or faintly rough, thin, not ramified or ramified, not branched or sub-dichotomously branched, septate.

Asci: 3-10 asci per ascocarp, not stipitate or indistinctly stipitate, 45-75 µm long, 30-45 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (3)-5-6 per ascus, ellipsoid or ovoid, 18-28 µm long, 11-18 µm wide; septa absent.

Conidiomata: Present (anamorph well developed); hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 25-36-(42) µm long, 7-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or cylindrical; macroconidial (germ tubes on an end, moderately long, simple, apex unlobed or slightly lobed), not branched, (25)-40-55-(65) µm long, 14-22 µm wide; aseptate.

(report generated 04.Okt.2007)