THE LARCH CANKER 51 



1914 with cultures grown from spores of the saprophytic 

 form of Dasyscypha calycina developed so far as to produce 

 the earlier apparent signs of canker, but no fructifications 

 of the fungus had been formed before my departure in June. 

 Subsequent infections, made in the same way with cultures 

 grown from the parasitic form, at Oxford, produced normal 

 cankers bearing fructifications, but no new features were 

 demonstrated by these experiments. 



