Erysiphe rhododendri J. N. Kapoor

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. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe rhododendri J. N. Kapoor. Type: Erysiphe rhododendri J. N. Kapoor.

Taxonomic Literature: Taxonomic notes: +ascocarp outer wall cells obscure, irregularly polygonal, 6-20(-25) µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [182] (1987).

Biogeography: Continent: Asia-Tropical. Country or state(s): Bhutan (Bhutan) & Sikkim (India) (only known from the type collection: Sikkim, Yumthang, 19-4-1962, Kapoor (HCIO 27849)).

Ecology: Biotroph; phytopathogenic; growing on leaves, usually hypophyllous or amphigenous. Host or Phorophyte Taxonomy: Rhododendron sp.; Rhododendron, Ericaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, not emerging (in the dense mycelium), scattered or gregarious, .095-.13 mm in diam.. Margin: External filaments present (about as long as the cleistothecial diam., somewhat longer or shorter); interwoven with surrounding mycelium, mycelioid, straight, 4-8 µm in diameter, hyaline or pigmented (later yellowish to brown below), few, growing all across the lower half of the ascocarp, smooth or rough, thin or moderatly thick (sometimes), not ramified, septate (with few septa); basal cell 4-8 µm long.

Asci: 6-12 asci per ascocarp, indistinctly stipitate, 50-80 µm long, 35-50 µm wide; dehiscence unitunicate.

Ascospores: c. 8 per ascus, spores 7-8 per ascus, 20-24 µm long, 14-16 µm wide; septa absent.

(report generated 04.Okt.2007)