412 



UREDINEAK. 



Willi resin, and as the same process goes on in liasL and rind, 

 the turpentine oversows from fissures or wounds in the bark. 

 During the summer the mycelium grows amongst the dividing 

 cambium-cells and kills them. Where this occurs the year- 



FiG. ^iiJ.^Pf.id'.i-niU'.ui pnii (i-ort'a-ola). 

 Young twig bearing numerous accidia. 

 (v. Tnbeuf phot.) 



Fic. ■Zib.''l\,-idtrnuvj,i piiii (i-orHcolo). 

 Branch and lateral twigs distinctly 

 swollen where attacked. They also bear 

 aecidia. (v. Tubeuf phot.) 



ring ceases to thicken, but as the mycelium seldom succeeds 

 during the first year in killing the cambiuni all round a 



