BY D. Mc ALPINE. 223' 



* 9. Gnomonia circumscissa, McAlp. — V. 



10. Ovularia circumscLssa, Sorok. 



11. Phyllosticta circumscissa, Cooke. 

 *12. P. perforans, Sacc. cfe Matt.~V. 

 *13. P.persicce, Sacc. — Y., S.A. 

 *14. P. prunicola, Sacc — V., S.A., Q. 



15. P. serotina, Cooke. 

 *16. Puccijiia pnuii, Pers.— V., N.S.W., Q., 8. A., T. 

 *17. Septoria amygdali, McAlp. — V. 



18. S- effusa, Desm. 



19. >S'. pruni, Ellis. 



20. *S'. ravenelii, Thuera. 



Cladosporium carpophiliim is usually associated with scabbing 

 of Peaches and Plums, but in Ohio it also causes "shot-hole" in 

 leaves of the Peach. f Plujllosiicta perforansX produces circular 

 or elliptic perforations, and Ovularia circ2(mscissa% is noted by 

 Sorokin as producing " shot-hole " just as bad as Cercospora 

 clrcumscissa. 



Fungi producing "Shot-hole" in Australia. 



Since the shot-hole appearance of the leaves of stone-fruit trees 

 has become very common of late years, I investigated the subject 

 at some length and examined over a thousand specimens in con- 

 nection with it. The results were very remarkable, and not only 

 were several fungi new to science discovered, but the relationships 

 of some of the fungi already known were cleared up. 



It does not necessarily follow that because a fungus is found 

 associated with the " shot-hole " it therefore jDroduces the disease. 

 This can only be definitel}^ settled by infection experiments, but 

 in the absence of such, there are a number of fungi so constantly 

 associated with the effects that in all probability they produce 

 them. Of the shot-hole fungi given above, the ten marked with 



t Selby, Bull. No. 92, Ohio Ag. Exp. Station, p. 231 (1898). 



: Sacc, Syll. xiv., p. 849 (1900). 



§ Sacc. Syll. xi. p. 598 (1895). 



