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

Erysiphe friesii var. dahurica (U. Braun) U. Braun & S. Takam.

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-07-27). Data set reviewer(s): Schubert K. (06-01-25); revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: variety. Synonyms: Microsphaera friesii var. dahurica U. Braun; Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Microsphaera friesii var. dahurica U. Braun. Type: Microsphaera friesii var. dahurica U. Braun.

Taxonomic Literature: Taxonomic notes: This variety differs from var. friesii by ascomata characters (see below).+conidiophores foot-cells straight to curved, rarely flexuous, followed by (1-)2-3 cellls of about the same length (or somewhat shorter or somewhat longer);+appressoria lobed;+ascomata outer wall cells obscure, irregularly polygonal, ca. 8-20 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [420-422] (1987).

Biogeography: Continent: Asia-Temperate. Region(s): Far Eastern Asia and China. Country or state(s): Japan and Korea (North & South).

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Rhamnus davurica var. nipponica Makino; Rhamnus, Rhamnaceae.

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-.105 mm in diam.. Margin: External filaments present; setiform, recurved (tips of the ultimate branchlets), .75-1.25 µm long, few or numerous, 7-15 per mm², growing between the lower and upper hald of the ascocarp, stiff and straight (or curved), smooth or rough, thin or thick (towards the apex), ramified, dichotomously branched (4-6 times, closely and regularly branched, tips recurved), septate.

Asci: 4-5 asci per ascocarp, not stipitate or indistinctly stipitate, 40-50 µm long, 25-45 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores (4)-5-7-(8) per ascus, subglobose, ellipsoid, or ovoid, 16-24 µm long, 9-12 µm wide; septa absent.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched; basal cells 15-32.5 µm long, 7.5-10 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid or cylindrical; macroconidial, not branched, 27-40 µm long, 10-16.5 µm wide; aseptate.

(report generated 04.Okt.2007)

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.