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. 
