2i6 Diseases of Greenhouse Crops 



Canna {Canna indicd) 



Cultural Considerations. The canna, although an 

 outdoor plant, is also extensively grown in the green- 

 house for propagation and for decoration. The va- 

 rieties best adapted for forcing may be mentioned: 

 Queen Charlotte, Madame Crazy, Explorateur. For 

 flowering in the greenhouse it is best to start with 

 dormant plants. 



Fungi Recorded on the Canna 



Carmas seem to be unusually free from diseases. 

 With the exceptioi^ perhaps of the rust, Uredo can- 

 na, the others here mentioned are saprophytes or 

 semi-saprophytes attacking old and weakened plants. 



Anthostomella achira Speg., Macrosporium bul- 

 botrichum Cke., Ophiobolus linosporoides Speg., 

 Uredo canna Wint. 



