258 INTRODUCTION TO THE STUDY OF FUNGI 



posed remedies are preventive and not curative; they could 

 hardly be otherwise until that period in their life-history is 

 more definitely determined which intervenes between the 

 maturity of the teleutospores and the inoculation of seedlings 

 of the host-plant. 



Assuming the total of known species to be somewhere 

 about three hundred, upwards of one hundred of these affect 

 the grasses, and nearly fifty attack other Monocotyledonous 

 plants, so that scarcely half of the total are found on Dicoty- 

 ledons. This is a peculiar fact in distribution which is 

 perhaps without parallel in any other family of the parasitic 

 Fungi. 



BIBLIOGRAPHY 



Db Toni, J. B. " Sylloge Ustilaginearum et Uredinearum," in Sacoardo, Sylloge 

 Fungorum. Imp. 8vo. Vol. vii. pt. ii. Padua, 1888. 



Fischer db Waldheim. Sur la Structure des Spores des Ustilaginees. Moscow, 

 1867. 



Apercu systimatique des XJstilagi/iUes. 1877. 



"Les Ustilaginees et leur Plantes nourricieres. " Arm. des Sci. Nat., 



6th series, vol. iv. Paris, 1877. 



"Winter, Geo., in Babenhorst's Kryptogamen Flora — Her Pilze. 8vo. Cuts. 



1884. 

 Woronin, M. Beitrag zur Kenntniss der Ustilagineen. 1882. 

 Massee, Geo. British Fungi — Phycomycetes and Ustilagineae. 8vo. Plates. 



London, 1891. 

 Tulasne. "Memoire sur les Ustilaginees comparees aux Uredinees." Ann. 



des Sci. Nat., 3rd series, vol. vii. Paris, 1847. 



"Second Memoire." Ann. des Sci. Nat., 4th series, vol. ii. Paris. 



Sohroter, J. " Bemerkungen und Beohachtungen u. einige Ustilagineen." 



Cohn, Beitrage s. Biol. , ii. 

 Brefeld, 0. Bot. Vhtersuch. ii. Hefenpilze. Leipzig, 1883. 

 Oorntj, M. "Contributions a l'liitude des Ustilaginees. " Bullet. Soc. Bot. de 



France. August 1883. 



