Oidium urenae W. Y. Yen

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. (00-08-01). Data set reviewer(s): Schubert K. (06-07-26); revised.

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

Type Information: Basionym: Oidium urenae W. Y. Yen. Type: Oidium urenae W. Y. Yen.

Taxonomic Literature: Taxonomic notes: +hyphae tortuose, branched, septate, 3.5-7.2 µm wide; +appressoria nipple-shaped to moderately lobed;+conidiophores foot-cells cylindric, followed by a longer cell or a cell of about the same length and 0-2 very short cells, occasionally a long foot-cell followed by 2 shorter cells;. Braun U., Beih. Nova Hedwigia 89: 1-700 [617] (1987).

Biogeography: Continent: Asia-Temperate. Country or state(s): Taiwan.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous (white, effuse, confluent). Host or Phorophyte Taxonomy: Urena lobata L.; Urena, Malvaceae.

Reproduction Strategy: Only known as sterile, asexually reproducing form.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched (erect, 3-4-septate, 106-246 x 12-18 µm); basal cells 60-200 µm long, 7.2-8.4 µm wide. Conidium Formation: Conidiogenous cells single. Conidia: Ovoid or doliiform; macroconidial (germ tubes at an end of the spore, short to long, simple, terminating in a lobed appressorium or without appressorium), not branched, 30-44.4 µm long, 18-22.8 µm wide; aseptate.

(report generated 04.Okt.2007)