610 THE FUNGI WHICH. CAUSE PLANT DISEASE 



A genus of some seventy-five species. 



C. glomerulosum Sacc. on Juniperus leaves is often reported 

 as Sporodesmium glomerulosum. 



C. carpophUum (L6v.) Aderh.*^- '"■ ^''^' *^^ Aderhold by inocu- 

 lations, properly controlled, showed this fungus capable of causing 

 gummosis of prunaceous hosts though C. herbarium did not do so. 

 Effuse, hyphsB simple or short-branched, densely aggregated, 

 septate, conidia elongate-fusoid, obtuse, 4 to 5-septate, slightly con- 

 stricted at the septa. It is commonly seen as 

 the cause of a brown spot on peaches. Spores 

 do not appear in the young spots but are found 

 sparingly in older brown areas. 



Pure* culture inoculations by Stewart ^ on 

 peach twigs resulted in blackening and gum- 



Fia.410.— Stigmina. mosis. 



After Saccardo. ^ amygdaleaxum (Pass.) Sacc. is also de- 

 scribed on rosaceous hosts. It is perhaps identical with C. car- 

 pophilum and may be connected with Pleospora vulgaris.'^^ 



C. putrefaciens (Fcl.) Sacc. causes spots on leaves of the sugar- 

 beet. 



Stigmina Saccardo (p. 608) 



Hyphae epiphyllous; conidiophores very short or obsolete; coni- 

 dia ovate or elongate, 3 or more-celled, aggregated. 

 S. briosiana Far. causes disease of apricots in Europe. 



Ceratophorum Saccardo (p. 608) 



Hyphae creeping, scant; conidiophores short, erect; conidia 

 fusoid or cylmdric, 2 to many-septate, dark or reddish-brown. 



A small genus. 



C. setosum Kirch, is found on leaves and shoots of young plants 

 of Cytisus, etc., in greenhouses; ™' 



C. ulmicolum E. & K. on Ulmus leaves. 



Heterosporium Klotzsch (p. 609) 



Hyphae subcespitose, smoothish, often branched; conidia oblong, 

 2 to several-septate, smoothish to granular or echinulate. 

 A genus of forty species or more. 



