I So PUCCINI ACK^. 



P. Xanthii. Schw. 

 No uredospores. 



Teleutospores, in bright ^^ellow spots, very conspicuous. 

 Spores, with long peduncles, cells unequal, hyaline. 

 Common on the leaves of Xanthium strumarium. 



P. coronati. 



Uredo and teleutospores very common on our oats (avena 

 sativa), producing our oat rust, which is very injurious, 

 destroying sometimes whole fields of oats. 



P. lychnidearum. Link, 



Uredospores, in summer yellow, round, scattered on the 



under surface of leaf. 



Teleutospores, spots yellowish, becoming pale. 



This is quite common on Sweet William, Lychnis chalcedonica. I found 

 specimen in December. 



Genus VII. GYMNOSPORANGIUM. Link. 



Peduncle extremely long, agglutinated by gelatine into a 

 tremeloid mass. Spores uniseptate. — Berkeley Outlines. 



G. sabinse. 



This is the cedar apple, hanging in gelatinous masses on our 

 cedar trees during a wet spell in the month of May. 

 Uredospores, none, except from some other source. 

 Trees look Ijeautiful when they are fresh. Common. 



Genus VIII. UROMYCBS. 

 Spores unilocular, attached permanently to a decided 

 peduncle of greater length. — Berkeley Outlmes. 



