268 



Report S.A.A. Advancement of Science. 



or waited appearance, and may not unfrequently be branched. From 

 these conidiophores the somewhat spindle-shaped spores are given off. 



These spores (Figure IV., a., b., and c.) unlike those in the 

 case of the Apple-fungus, never become septate ; and, further, when 

 they germinate, the germ tube arises at right angles to the length of 

 the spore, instead of growing straight out, as in the case of F. 

 dendriticnm. 



From this examination we are led to conclude that the disease, 

 long known amongst Apples and Pears in Cape Colony, is due to two 

 distinct (but closely related) fungi. 



That causing disease amongst Pears is due to the fungus Fiisi- 

 cladiiim firifinm, Fckl., while that attacking Apples is caused by the 

 fungus Fusicladimn dendriticnm, Fckl. 



These fungi are readily distinguished, the one from the other, 

 under the microscope, and they are identically the same as those 

 which cause the disease known in Europe, Tasmania, Canada, 

 America, and Australia, imder various names as Fusicladium, Scab, 

 Scurf, Black Spot, and Cracking. 



I. & II. Fusicladium dendriticnm, Fckl. 



III. & IV. Fusicladium pirinum, Fckl. 





»>si y- 



!h 



*i 





\ 



\ 



'■5 n 



-'"■y 



Fusicladium, Figures I., II., a., b., c. ; III.. IV., a., b., c. 



