PARASITIC HOSE CANKER. 



223 



dark reddish colour. All showed this with the exception of the worst 

 cankered specimen, where no discolouration of the neighbouring tissue 

 was distinguishable. 



Small portions of this reddish tissue were examined under the 

 microscope and were found to be covered with very minute fissures and 



Yio. 33. — Parasitic Rose Cankek. 



globular or oval elevations— the latter still covered by the bark. Higher 

 magnification revealed, in the small fissures of the bark, round black- 

 bodies, breaking through the bark with a round opening at the apex. 

 The examination of sections through this part of the bark proved that 

 the round black bodies belonged to a fungus and that the slight elevations 

 were due to bodies of the same nature which had not yet broken through 



