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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. (06-03-27); revised.

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

Type Information: Basionym: Microsphaera rayssiae Mayor. Type: Microsphaera rayssiae Mayor.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells cylindric;+ascomata outer wall cells irregularly polygonal, ca. 8-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [348-349] (1987).

Biogeography: Continent: Asia-Temperate (Israel), Europe, and Southern America (Argentina). Country or state(s): United Kingdom, Switzerland (incl. Liechtenstein), France (excl. Corsica), Spain (incl. Andorra & Monaco), Greece, Italy (incl. San Marino & The Vatican City, excl. Sicily, Sardinia), Romania, Former Yugoslavia [incl. Bosnia and Herzegovina, Croatia, Macedonia, Moldova, Serbia and Montenegro, Slovenia], and Ukraine.

Ecology: Biotroph; phytopathogenic; growing on stems or leaves, amphigenous. Host or Phorophyte Taxonomy: Spartium junceum L.; Spartium, Leguminosae-Papilionoideae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .09-.15 mm in diam.. Margin: External filaments present (more or less horizontally spread); interlaced with each other (and with the appendages of the surrounding ascocarps, often), mycelioid, recurved (tips of the ultimate branchlets in fully mature samples always distinctly recurved, sometimes almost spirally), 2-8 µm long, 5-11 µm in diameter, hyaline or pigmented (occasionally near the base), numerous, 5-20 per mm², growing between the lower and upper hald of the ascocarp, flexuose or geniculate (bent) (to undulate), verrucose (evidently), thin or moderatly thick (towards the base), not ramified (at first, later branched (2)) or ramified, dichotomously branched (1-6 times, branchings diffuse, lax, sometimes more regular, often deeply cleft, tips of the ultimate branchlets in fully mature samples always distinctly recurved, sometimes almost spirally, primary and secondary branches often also recurved), aseptate.

Asci: 3-10 asci per ascocarp, not stipitate (rarely) or indistinctly stipitate, (45)-50-70-(75) µm long, 30-50 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 3-5 per ascus, ellipsoid or ovoid, 16-28 µm long, 9.5-16 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched; basal cells 20-30 µm long, 6-8 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, ovoid, doliiform, or cylindrical; macroconidial, not branched, (22)-25-40-(45) µm long, 13-22 µm wide; aseptate.

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