Erysiphe acalyphae (F. L. Tai) R. Y. Zheng & G. Q. Chen

Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-01-24); revised.

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

Type Information: Basionym: Uncinula acalyphae F. L. Tai. Type: Uncinula acalyphae F. L. Tai.

Taxonomic Literature: Taxonomic notes: +conidiophores long and slender, 1-4 celled, the basal cell 4-6 times as long as the other cells, 46-114 µm long, up to 243 µm, 4.3-7 µm wide;+ascocarp outer wall cells irregularly polygonal to rounded, abscure, 5-20 µm diam.;asci mostly immature, spores not developed. Braun U., Beih. Nova Hedwigia 89: 1-700 [234-235] (1987).

Biogeography: Continent: Africa (Rhodesia, Tanganyika), Asia-Temperate, and Asia-Tropical. Region(s): China. Country or state(s): Ghana, Sudan, Uganda, Zambia, and Mauritius (Southern Africa, island in the Indian Ocean, east of Madagascar); Taiwan; India.

Ecology: Biotroph; phytopathogenic; growing on leaves, amphigenous. Host or Phorophyte Taxonomy: Acalypha brachystachya Hornem.; Acalypha, Euphorbiaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious, (.07)-.08-.145 mm in diam.. Margin: External filaments present (width uniform or decreasing from base to top, apex straight, pointed to rounded, rarely somewhat inflated, somewhat recurved or irregular, rarely abruptly constricted at the base or just below the apex); setiform, somewhat recurved (rarely) or straight (, pointed to rounded, rarely somewhat inflated or irregular, rarely abruptly constricted at the base or just below the apex), .5-1.5 µm long, 4-9 µm in diameter, hyaline or pigmented (brown throughout or only below, paler upwards, apex hyaline or yellowish), numerous, (10)-20-50 per mm², growing between the lower and upper hald of the ascocarp or on the upper half of the ascocarp, stiff and straight (rather), smooth or verrucose, thin, moderatly thick, or thick (rarely thin above and thick towards the base), not ramified, aseptate or septate (0-1-septate, occasionally few septum-like lines in the upper half).

Asci: 3-12 asci per ascocarp, not stipitate or indistinctly stipitate, 30-60 µm long, 20-35 µm wide; dehiscence unitunicate.

Ascospores: c. 4 per ascus, spores 4 per ascus, 11-17 µm long, 8-14 µm wide; septa absent; wall thin, remaining hyaline, hyaline, not ornamented.

Conidiomata: Present; hyphomycetous.

Conidiophores: Pseudoidium-type; not branched. Conidium Formation: Conidiogenous cells single. Conidia: Ellipsoid, ovoid, or doliiform; macroconidial, not branched, 16-30 µm long, 9-16 µm wide; aseptate.

(report generated 04.Okt.2007)