THE AECIDIAL STAGE OF PUCCINIA GRAMINIS PERS. 287 



{2) 1906 — Mc Alpine, D. "Rusts of Australia," p. 64 etseq. 



(3) 1865 — DeBary, A. Neue Qntersuchungen ueber die Uredi- 



neen, ins besondere die Entwickelung der Puccinia 

 graminis und den Zusainmenhang derselben mit 

 Aecidium berberidis. Monatsber. K. Acad. d. Wiss, 

 p. 25. 



(4) 1915 — Lind, J. "Effect of Destruction of the Barberry 



(Berber is vulgaris) on the Common Rust of Wheat 

 (Puccinia graminis) in Denmark. Inter. Rev. Sci. 

 Prac. Agr. Year VIJ, No. 3, p. 442. 



(5) 1892 — Cobb, N. A. "Contributions to a Knowledge of Aus- 



tralian Rusts." Agr. Gaz. N.S.W., Vol. Ill, p. 57. 



(6) 1918 — Butler, E. J. "Fungi and Disease in Plants," pp. 



154 and 159. 



(7) 1919— Levine, M. N. "The Epidemiology of Cereal Rusts." 



U.S. Dept. Agr. Bureau of Plant Industry (Mimeog) 

 p. 10. 



(8) 1904— Fischer, Ed. "Die Uredineen der Schweiz." Beitrage 



zur Kryptogamenflora der Schweiz. (Heft II.) 



(9) 1898— Plowright, C. B. "Barberry and Wheat Mildew." 



Gardeners' Chronicle, Vol. XXIII, p. 45. 



(10) 1913— Grove, W. B. "British Rust Fungi," p. 250. 



Explanation of Plate. 



Photographs 2 and 3 and photomicrographs 4 and 5 by H. 

 Gordon Gooch. 



1 . A plant of Berberis vulgaris with a young shoot enclosed in 

 a glass cylinder during inoculation. 



2. Showing spermagonia on the upper surface of a barberry leaf 

 infected with sporidia of an Australian form of Puccinia graminis 

 on wheat. x 2*5. 



3. Aecidia on lower surface of a barberry leaf infected with 

 Australian rust. x 1*4. 



