96 



43- Chamacyparis nutkcensis. 



The foregoing remarks apply to this in every 

 respect. As appears from the demeanour of the 

 tree in the experimental gardens of Grafrath, the 

 Nutka cypress suffers even more than the Lawson 

 variety from Pestalozzia funerea, which causes 

 the decay of the bark on the young shoots, so 

 that the overlying shoot (top or side shoot) dies 

 off, due to the swelling of its base through its 

 thickening in size during the growing season 

 following the destruction of the bark. 



44. Picea engelmanni. 



45. Picea pungens. 



Engelmann's spruce does not appear to possess 

 any advantage over the European variety, and 

 where it is indigenous it can be treated in exactly 

 the same way as the latter. 



The prickly spruce starts fresh growth some- 

 what earlier than the European one, and suffers 

 less than the latter under certain circumstances — 

 as, for instance, if late frosts set in pretty early. 

 Whether this circumstance, as well as its prickly 

 needle-like leaf formation, suffice as a protection 

 against animals to justify its cultivation at the 

 expense of the European spruce may remain a 

 moot point. 



