Botanische Staatssammlung München © 1995–2008
Data remain intellectual property of the data set authors.

The description has been generated directly from a database. In cases of errors and insufficiencies consult the corresponding LIAS data entry and revision forms to make the necessary modifications. Changes will appear in the subsequent update of data entry forms and natural language descriptions. [To verify the actual status of the pages, select the reload frame function in the context menu!]
These pages are XHTML compatible designed. May be that problems arise with older web browser versions.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-26). Data set reviewer(s): Schubert K. (06-03-23); revised.

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

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

Taxonomic Literature: Taxonomic notes: +ascomata outer wall cells obscure, irregularly polygonal, ca. 10-25 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [359-360] (1987).

Biogeography: Continent: Northern America (USA, north central states and north eastern states, Tex.; Canada). Country or state(s): Ontario (Canada) and Texas (USA).

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (usually). Host or Phorophyte Taxonomy: Ostrya virginiana (Mill.) K. Koch; Ostrya, Corylaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.065)-.075-.115-(.125) mm in diam.. Margin: External filaments present; recurved (when mature), (1)-2-2.5-(3.5) µm long, 5-7.5 µm in diameter, hyaline or pigmented (brown at the very base), few, 4-15 per mm², growing between the lower and upper hald of the ascocarp, flexuose, smooth or rough, thin or thick (towards the base), ramified, dichotomously branched (3-5 times, branchings regular, close, compact, tips recurved when mature), aseptate or septate (0-3-septate, septa near the base).

Asci: 4-10 asci per ascocarp, not stipitate or indistinctly stipitate, 40-65 µm long, 25-40 µm wide; dehiscence unitunicate.

Ascospores: c. 4 to c. 8 per ascus, spores 5-8 per ascus, subglobose, ellipsoid, or ovoid, 14-20 µm long, 9-13 µm wide; septa absent.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or doliiform; macroconidial (length and width measured in dry state !), not branched, 24-30 µm long, 12-14 µm wide; aseptate.

In case that additional characters and states are required to be included in this data set, consult the LIAS Instructions to Participants and follow the procedures described there.

LIAS Home