APPENDIX. 



[The following article on the Fungous Diseases of Primulaceae 

 was contributed to the Gardeners Chronicle, by Mr. W. G. 

 Smith, and is here inserted, as likely to be of interest to 

 cultivators.] 



Diseases of Primulaceae as caused by Fungi. By Worthtngton 



G. Smith. 



The members of the natural order Priinulaceas are attacked by 

 but few fungi, and of these the majority grow on the species 



Fig. 27.— Primula Disease : Peronospora interstitialis. 



belonging to the genus Primula. In the case before us, as in 

 several others, where the number of species of fungi belonging to 

 any natural order of plants is small, the smallness of the number 

 is counter-balanced by the virulence of one or two of the fungoid 

 species. 



