198 president's address. 



of reddish spores, also, in former times, considered as a species 

 of an independent genus, Uredo linearis (Lambert), and, finally, 

 in the autumn; on the same mycelia, black bilocular spores, de- 

 nominated Teleutospores (or final spores), which are those that 

 remain as seeds, during the whole winter. When a season of 

 higher temperature again comes round these teleutospores germi- 

 nate, forming esporidice, which, falling upon the leaves of the 

 Berberis vulgaris, reproduce the Aecidii or cluster-cups. 



Summing up, and presenting the principal names whereby 

 the forms of this fungus have been designated, we shall have: 



Puccinia graminis, Pers. (Dispos. Method., p. 39). 



Sijnonyma : 



Aecidiumspores : Lycoperdon poculiforme, Jacq. 



Aecidium Berleridis, Gmel. 

 Uredospores and Teleutospores : 



Uredo linearis : a, frumenti, Lam. 

 Uredo culmarum, Schum. 

 Uredo frumenti, Sowerby. 

 Puccinia cerealis, Marb. 



I do not know whether cereals have of late been much attacked 

 by Mildew, Eust, or Brand in England, but I find, by works 

 which I am acquainted with, that formerly they were very much ; 

 that of Lambert, in 1797 (v. Transactions of the Linncean Society, 

 TV.); of Kirby, in 1799 (y. Transactions of the Linncean Society, 

 Y.) ; and of Joseph Banks and Francis Bauer, in 1803 (v. Agri- 

 cultural Journal)', of Edwin Sydney, in 1846 {Blights of the 

 Wheat, and their Remedies); of M. C. Cooke, in 1865 {Rust, 

 Sweat, Mildew, and Mould) ; and others, up to the recent experi- 

 ments of Prof. A. B. Griffiths, in the Lincoln College of Science 

 {v. The Chemical Neivs, Journal of the Chemical Society, 1885), 

 and of George Edgson, of Etton. 



Shortly, however, before the Tyneside Naturalists' Eield Club's 

 excursion to Wooler, i.e., in August, 1887, the Erench National 

 Society of Agriculture, being informed that cereals covering 70 

 to 100 acres were completely ruined by the Black Bust {Rouille 

 noir), sent a Commission to study the fact. 



On this occasion the well-known naturalists, Professors 



