PASSALORA. 507 



brown septate conidiophores, bearing long, two-celled, obovate 

 conidia. 



Fusicladium. 



Mycelium greenish and sparingly septate. Conidiophores in 

 tufts, short, erect, and bearing terminal conidia. Conidia ovoid 

 or clavate, and one or two-celled. 



The species are conidial forms of Venturia, and have already 

 been considered. Some of the better-known forms are : 



Fusicladium dendriticum Wallr. (Britain and U.S. America). 

 This attacks the leaves, shoots, and fruits of the apple (see p. 218). 



Fifi. Z12.— Ventiirin (Fusicladium) dendrilicuvi forming brown wixits on an 

 apple ; those still In the earlier stages have a radiate margin and bear conidia. 

 The enlarged section shows two rows of large-celled parenchyma of the apple, 

 covered bv a stroma of pseudopareuchyma bearing conidiophores and conidiu. 

 (V. Tubeuf del.) 



F. pirinum (Lib.) (U.S. America). This is a cause of 

 " spotting " on leaves and fruits of the pear, also of species of 

 Crataegus and Amclanchier. The conidial patches are brownish 

 in colour. Peglion states that this parasite forms sclerotia in 

 tlie bark of twigs. It is probably a conidial form of Venturia 

 ditricJia rar. 'pl/ri. 



F. cerasi (IJabh.) attacks the cherry orchards with such 

 virulence that tlie crop may be rendered quite unsaleable. 



F. eriobotryae Cav.^ Cavara states that this attacks the 



' Cavaia, Rivista di Patologia Ver/efale, 1892. 



