1922-23 



DEPARTMENT OF LANDS AND FORESTS 



207 



them bearing rust pustules (283 all told) and not one of the controls developed 

 either lesions or pustules. The appended table shows the experiment in detail. 

 The experiment demonstrates conclusively that the new rust on balsam is the 

 alternate phase of the long-known fern rust Hyalopsora aspidiotus, the first 

 species of the Hyalopsora rusts, the connections of which have been elucidated. 



First 



249 



283 



