Search on : Taxa descriptions

 


   
Literature:
 
Page number:57 
Remarks (internal):The teleomorph was described and illustrated in detail by BARR (1968) and SIVANESAN (1977, 1984a). Due to the structure of the conidiogenous loci and conidial hila, Cladosporium humile has to be excluded from Cladosporium and assigned to Fusicladium, which is consistent with its connection with a Venturia teleomorph. The report of Cladosporium humile from India (Kashmir) on Populus (BEIG & KHAN 1999) probably refers to either Fusicladium martianoffianum or F. romellianum. 
Description type:Non-original description 
Description:Fusicladium humile (Davis) K. Schub. & U. Braun, IMI Descriptions of Fungi and Bacteria 152, No. 1520 (2002) Fig. 26
= Cladosporium humile Davis, Trans. Wisconsin Acad. Sci. 19: 702 (1919); lectotype: on Acer rubrum, USA, Wisconsin, Luck, 25 Aug. 1916, J.J. Davis (WIS), selected here; isolectotype: BPI 427214.
= Fusicladosporium humile (Davis) Partridge & Morgan-Jones, Mycotaxon 85: 366 (2003).
Teleomorph: Venturia acerina Plakidas ex M.E. Barr, Canad. J. Bot. 46: 814 (1968).
Lit.: PLAKIDAS (1942: 35), ELLIS (1976: 340), SIVANESAN (1977: 26-27), PARTRIDGE & MORGAN-JONES (2003: 366).
Ill.: PLAKIDAS (1942: 30, Fig. 2), ELLIS (1976: 340, Fig. 258), SIVANESAN (1977: 26, Fig. 2; 1984a: 607, Fig. 364), IMI Descr. (No. 1520, Figs A-C), PARTRIDGE & MORGAN-JONES (2003: 365, Fig. 3).
Leaf spots (only associated with the anamorph) amphigenous, variable in shape and size, subcircular to angular, 0.5-20 mm wide, dark reddish brown on upper leaf surface, greyish below, sometimes zonate, margin irregular, pale grey. Mycelium internal, hyphae subhyaline to pale brown, rough-walled, septate, forming mainly subcuticular net-like aggregations, effuse. Colonies amphigenous, punctiform to subeffuse, dark. Stromata 35-80 µm diam., composed of thick-walled, brown cells, 4-10 µm wide. Conidiophores solitary, arising from internal or external, superficial hyphae or swollen hyphal cells, or formed in loose fascicles arising from stromata, erect to flexuous, straight to geniculate, unbranched or occasionally branched, 15-70 x 3.5-6 µm, septate, olivaceous to pale brown, smooth, wall somewhat thickened. Conidiogenous cells integrated, terminal or intercalary, with a single or several denticle-like conidiogenous loci, proliferation sympodial, loci unthickened, not or only slightly darkened-refractive. Conidia catenate, in simple or branched chains, cylindrical or fusiform, straight or slightly curved, 10-29 x 4-7 µm, 0-2(-3)-septate, not or somewhat constricted at the septum, pale olivaceous to medium brown, smooth, attenuated towards apex and base, apex pointed or truncate, base truncate, hila 1-3(-3.5) µm wide, unthickened, not darkened.
Hosts and distribution: on Acer spp. (Aceraceae), North America - Acer negundo (USA), A. nigrum (USA), A. rubrum (Canada, NB., Nfld., Ont.; USA, AL, MI, NY, WI), A. saccharinum (USA, NC, WI), A. saccharum (Canada, Ont.), A. spicatum (BARR 1968: USA).
Material examined: collections from WIS.
 
Taxon name: