president's address. 197 



Eriophorum vaginatum, L. — Langleyfordside to Cheviot, and 

 frequent on the summit. 



Agrostis alba- L. — Between Langleyford to Cheviot. 



Cryptogaile.^Acrogenes. 



Lomaria spicant, Desv. — Langleyfordside to Cheviot. 



Pteris aquilina, L. — Yeavering Bell, north side. 



Polypodium vulgare, L. — Idem. 



Polypodium Bryopteris, 



Lastraea FUix-mas, Presl. — "Wooler to Chillingham, under oak 

 trees. 



Lycopodium Selago, L. — Bogs on summit of Cheviot. 



Lycopodium elavatum, L. — Prom Langleyford to Cheviot. 



Lycopodium alpinum. L — Near the summit of Cheviot. 



Sphagnum acutifolium, Ehrb ? — Bogs on the summit of Cheviot 

 and from Langleyford to Cheviot. 



Pdngi. — Aecidiomycetes. 



Puccinia graminis, Pers. — Aecidii, on leaves of the Berber is 

 vulgaris, L. ; Teleutosporce, on the leaves of different Graminea?. 



The mention of the Puccinia graminis leads me naturally to 

 the second part of this note. 



II. 



Prom what I saw, and from the conversation which we had 

 at the time I found it, as also from what I afterwards had occa- 

 sion to observe, it seems to me that there would be an advantage 

 in making this fungus more popularly known amongst the agri- 

 cultural classes of the north of England. 



The Puccinia graminis is the fungus which, in two of its 

 forms, causes the parasitical disease in cereals known in England 

 by the names of Corn Mildeiv, Blight, Rust, or Brand. 



It is known now that this species presents three forms com- 

 pletely different. The first form lives upon the Berberis vulgaris, 

 as the so-called Berberis cluster-cups, and was formerly supposed 

 to constitute an independent species called Aecidium Berberidis 

 (Pers.). The spores coming out of those cluster-cups grow on 

 the Graminea?, there forming, in the beginning of spring, groups 



