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 

 Funsi. 



BIBLIOGRAPHY 



De Toni, J. B. " Sylloge Ustilagiuearum et Uredinearum," in Saccardo, Syllogc 

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



Fischer de Waldheim. Sur la Structure des Sjwres des Ustilaginics. Moscow, 

 1867. 



Apcrgu systimatique des Ustilaginies. 1877. 



"Les Ustilaginees et leiir Plantes nourricieres." Ann. des Sci. Nat., 



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



"Winter, Geo., in Rabenhorst's Kryptogamen Flora — Dcv Pilzc. 8vo. Guts. 



1884. 

 WORONIN, M. Bcitrag zur Kenntniss der Ustilaginecn. 1882. 

 Massee, Geo. British Fu7igi — 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., 4tli series, vol. ii. Paris. 



ScHROTER, J. "Bemerkungen und Beobachtungen ii. einige Ustilaginecn. " 



Cohn, Beitrage z. Biol., ii. 

 Brefeld, 0," Bot. U7itersuch. ii. Refenpilze. Leipzig, 1883. 

 CoRNU, M. "Contributions t\ I'^^tude des Ustilaginees." Bullet. Sac. Bot. de 



France. August 1883. 



