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Podosphaera plantaginis (Castagne) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-05-17); revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Synonyms: Sphaerotheca plantaginis (Castagne) L. Junell; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe plantaginis Castagne.

Taxonomic Literature: Taxonomic notes: +conidiophores foot-cells cylindric, sometimes slightly increasing upwards, followed by 1-3 shorter cells;+appressoria nipple-shaped;+ascoc. outer wall cells irregularly polygonal, 10-40 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [137-138] (1987); Braun U., The powdery mildews (Erysiphales) of Europe.- 1-337. Jena, Stuttgart, New York (1995).

Biogeography: Northern hemispheric. Continent: Asia-Temperate, Europe (all), and Northern America (USA, Wyo. to Wis. and N.J.). Region(s): Siberia, Far Eastern Asia, and Middle Asia. Country or state(s): Wyoming (USA), Wisconsin (USA), and New Jersey (USA).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Plantago lanceolata L.; Plantago, Plantaginaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, .07-.105 mm in diam.. Margin: External filaments present (constantly short, about as long as the cleistothecial diam. or shorter, often rudimentary; two types of appendages, either narrow and hyaline or yellowish, or coarse and brown throughout; width variable, with constrictions; sometimes nearly absent); mycelioid, straight, 1-1.5 µm long, 4-11 µm in diameter, hyaline (or yellowish) or pigmented, few or numerous, growing all across the lower half of the ascocarp, smooth, thin, not ramified, septate.

Asci: 1 asci per ascocarp, not stipitate, 50-80 µm long, 50-70 µm wide; dehiscence unitunicate.

Ascospores: c. 8 (development of the ascospores rather late, asci mostly immature) per ascus, spores 6-8 per ascus, subglobose, ellipsoid, or ovoid, 16-24 µm long, 10-16 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Euoidium-type; not branched; basal cells 45-75 µm long, 10-14 µm wide. Conidium Formation: Conidiogenous cells in chains. Conidia: Ellipsoid, ovoid, or doliiform; macroconidial, not branched, 25-38 µm long, 15-20 µm wide; aseptate; with distintly visible fibrosin body fibrosin bodies.

(report generated 04.Okt.2007)

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