BY D. McALPINE. 225' 



stage of it. It may either succeed or accompany the latter, and 

 occurs on all the cultivated species of Frumis, although C. amyg- 

 (laleariim has not as yet been found on the Cherry here. The 

 pustules are not usually found on the leaves still borne by the 

 tree, as the brown spots fall away and then develop the perithecia, 

 but during wet autumns they are not at all uncommon on 

 attached leaves. On the shrivelled rotten fruits lying on the 

 ground the perithecia sometimes literally cover the surface. 



Saccardo"^ suggests that the highest or ascidial stage of this 

 fungus is Le2)tosphaerla ijomona^ Sacc, but I have only found 

 i. vagahimda, Sacc, on dead Peach branches. 



The life-history as far as definitely known at present would be 

 represented thus : — 



1. Conidial stage (Clasferosporium) . 



2. P^'-cnidial stage ( PhijUostlcta). 



These stages are usually accompanied by various oth^r fungi 

 which act as scavengers and hasten decay. 



While neither of these two stages has been found north of the 

 Dividing Range in Victoria, their place seems to be taken by two 

 other related fungi which produce shot-hole effects, viz., Ascochyta 

 chlorospora and Gnomonia circumscissa. 



Ascochyta chlorospora was first found on languid leaves of the 

 Plum in Italy, but has since been met with in Victoria and South 

 Australia, causing " shot-hole " of the Almond, Apricot, Peach 

 and Plum. It also occurs on the withered fruit of Peach and 

 Apricot, and although found in the neighbourhood of Melbourne, 

 it seems more particularly adapted for the Goulburn Valley and 

 the dry northern regions. 



Gnomonia circumscissa was often found associated with the 

 preceding, and I regard it as the ascidial stage of that fungus. 

 It occurred on the leaves of the various cultivated species of 

 Prunus. scattered promiscuously over the leaf when dead, but on 

 definite rounded spots on the living leaf, from which the tissue 



* .Syll. Fung. iii. p. 5 (18S4). 



