Erysiphe astragali DC.

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: species. Synonyms: Microsphaera astragali (DC.) Trevis.; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe astragali DC.

Taxonomic Literature: Taxonomic notes: +appressoria lobed;+conidiophores foot-cells cylindric, followed by two shorter cells, sometimes by one longer cell;+ascocarp outer wall cells irregularly polygonal, obscure, ca. 6-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [298-299] (1987); Braun U., The powdery mildews (Erysiphales) of Europe. - 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Continent: Asia-Temperate, Europe, Northern America (USA), and Asia-Tropical. Region(s): Siberia, Far Eastern Asia, and China (+ Asia Minor to Central Asia). Country or state(s): Austria, Germany, Switzerland (incl. Liechtenstein), France (excl. Corsica), Portugal, Spain (incl. Andorra & Monaco), Romania, European Turkey, Belarus, Baltic States (Estonia, Lithuania, Latvia), and Ukraine; Japan; Pakistan.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Astragalus glycyphyllos L.; Astragalus, Leguminosae-Papilionoideae.

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-.155 mm in diam.. Margin: External filaments present (basal part mostly distinctly curved, appendages horizontally spread or usually turning towards one direction, sometimes fasciculate); mycelioid, recurved (+ primary branches sometimes recurved, occasionally forked in the lower half) or straight, 2-12 µm long, 5-12 µm in diameter, hyaline or pigmented (near the base), few or numerous, 5-25 per mm², growing between the lower and upper hald of the ascocarp or somewhat on the upper half of the ascocarp, flexuose, smooth or rough, thin (above) or thick (towards the base), not ramified (mostly) or ramified, dichotomously branched (1-3 times, branchings loose and wide, lax, tips straight or recurved, primary branches sometimes recurved, occasionally forked in the lower half), aseptate or septate (1-2(-3)-septate near the base).

Asci: 5-14 asci per ascocarp, indistinctly stipitate (mostly), 50-85 µm long, 25-50 µm wide; dehiscence unitunicate.

Ascospores: c. 4 or c. 8 per ascus, spores (2)-3-5-(6) per ascus, subglobose, ellipsoid, or ovoid, (15)-18-26 µm long, 10-16 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 30-50 µm long, 8-10.5 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or cylindrical; macroconidial (length and width measured in fresh state), 30-45 µm long, 16-24 µm wide; aseptate.

(report generated 04.Okt.2007)