308 HALF-HOURS IN THE GREEN LANES. 



objects to these may be found on the leaves of 

 many of our summer plants. Those of the Common 

 Pilewort (Ranunculus ficaria) are especially liable to 

 beautiful " rust," called " cluster-cups," on account 

 of their resembling a number of cups closely packed 

 together, when examined with a lens. The "brands," 



Fig. 249. 



The Bramble-leaf Brand (Aregma bulbosum, Fr.). 



as they are called, belong to the same group of 

 parasitic fungi. If you examine the leaves of the 

 common bramble, towards the middle of the summer, 

 you will frequently see the under surfaces covered 

 with blotches of yellow dust. As autumn ap- 

 proaches, darker bodies will be found mixed with 



