44 TOWN PLANTING 



Some affect only one tree, others extend to 

 several species. A most destructive enemy 

 of the Oak is Poly poms sulphureus; less so 

 P. quercinus, while the well known dry rot 

 is traceable to Mer alias lacrymanus. The 

 Beech has several pests, including Polyporas 

 caticalaris, Flstallna hepatica, and the curious 

 and handsome Hydnam coralloides, which is 

 fairly plentiful in our larger centres of industry. 



The London Elms are attacked by Poly- 

 poras sqaamosas, which is scaly above 

 and of a stiff leathery consistency. The 

 Willow and Poplar suffer from Polyporas 

 igniarias, as also the common Plum; while 

 Polyporas hispid us affects the Ash. Two 

 other beautiful fungi grow on the Ash, viz. : 

 Lentinas tigrinas and L. Danalii. 



The curious Jew's ear (Harneola aaricala- 

 Jadae) is fairly common on the Elder and 

 perhaps more so on the Elm, all over 

 London. The Lime .is fairly free from 

 attack, although Polyporas vegetas some- 

 times afflicts it. 



Collecting and burning all diseased parts, 



