Erysiphe crispula (U. Braun) U. Braun & S. Takam.

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

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

Type Information: Basionym: Microsphaera crispula U. Braun. Type: Microsphaera crispula U. Braun.

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, polygonal, ca. 8-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [349-351] (1987).

Biogeography: Continent: Asia-Temperate (Central Asia; (6) USA: Colo., Mont., N.Y.) and Northern America. Region(s): Siberia. Country or state(s): Colarado (USA), Montana (USA), and New York (USA).

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Astragalus sp.; 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-.16 mm in diam.. Margin: External filaments present (horizontally spread, contorted); mycelioid, often recurved or straight, 2-7 µm long, 5-11 µm in diameter, hyaline or pigmented (near the base), numerous, 8-25 per mm², growing more or less between the lower and upper hald of the ascocarp, geniculate (bent) (to undulate, sometimes subnodulose), smooth or rough, thin or moderatly thick (in the basal half or thin throughout), not ramified or ramified, dichotomously branched (1-5 times, branchings very loose, wide, branches of various orders frequently recurved, flexuous or curled, ultimate tips straight or often recurved, sometimes almost spirally coiled), aseptate or septate (rarely a single septum near the base).

Asci: 4-12 asci per ascocarp, distinctly stipitate (mostly), 50-80 µm long, 25-45 µm wide; dehiscence unitunicate.

Ascospores: 1–2, c. 4, or c. 8 per ascus, spores (2)-3-4-(6) per ascus, subglobose, ellipsoid, or ovoid, 15-25 µm long, 9.5-15.5 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or cylindrical; macroconidial, not branched, 27-38 µm long, 14-18 µm wide; aseptate.

(report generated 04.Okt.2007)