198 CRYPTOGAMIA FUNGI. 



grass, the spots are of a less pure white than on other 

 plants. 



* * Colour yellow or orange. 



2. U. Pyrolce, spots small, circular, depressed, orange-yellow, 

 closely scattered over the leaf, sometimes clustered; capsules 

 ovate or oblong. GREV. FL Edin. 440. 



Hob. On the inferior surface of the leaves of Pyrola minor., 

 abundant. 



3. U. linearis, spots oblong or linear, yellow, following the 

 nerves of the leaf, and sometimes forming long lines ; capsules 

 ovaL HOOK. Scot. ii. 15. GREV. FL Edin. 440. 



Hob. On the leaves of corn and grasses, very common, in- 

 festing both sides, and producing the disease called Rust. 



4. U. ovata, spots small, irregular or confluent, orange-yellow, 

 scattered ; capsules ovate* GREV. FL Edin. 442. 



Hob. On the leaves of the birch, very common. 



5. U. Senecionis, spots orange-yellow, irregular, becoming con- 

 fluent, scattered over the lower surface. GREV. FL Edin. 438. 



Hob. On the leaves of groundsel (Senecio vulgaris et sylva- 

 )) frequent. 



6. U. TussilaginiSj spots bright reddish-orange, crowded, gene- 

 rally forming circles ; capsules subovate GREV. FL E<fin. 437. 



Hob. On the leaves of coltsfoot, principally in autumn. 



7. U. Sonchi, spots scattered thickly over the leaf, small, circu- 

 lar or irregular, red, rich yellow or brownish yellow; capsules 

 ovate __ PURT. Mid. FL iii. 299. GREV. FL Edin. 441. 



Hob. On sow thistles (Sonchus arvensis et oleraceus), very 

 common. 



8. U. Petasitis, spots orange coloured, minute, irregular becom- 

 ing confluent ; capsules oval GREV. FL Edin. 441. 



Hob. On the under surface of the large leaves of the but- 

 ter bur, common. 



