"508 Scientific Proceedings, Royal Dublin Society. 



LXXI.— NOTE ON AN ABNOEMAL DEVELOPMENT OF PICEA 

 PINSAPO. By GEEENWOOD PIM, M. A. 



[Eead, June 15, 1885.] 



Passing through Powerscourt demesne, a week or two ago, my 

 attention was arrested by a curious growth, on a rather large speci- 

 men of Picea pinscqw, of which I submit a photograph. A large 

 side branch had divided into two, each of which was about 1| inches 

 in diameter. Of these one grew in the usual horizontal manner, 

 while near its origin the other developed into a gouty swelling, 

 from which the normal branch was not much more than half an 

 inch thick. At right angles to this, and from the swelling, arose the 

 growth which caught my eye, a dense bush of short rather slender 

 shoots, of a pale yellow green, quite (different from the usual colour 

 of the young growth in this species, and so thick as to be quite 

 impenetrable to vision, somewhat reminding one of the " nests " 

 of a birch tree. It contrasted in colour much more than appears 

 in the photograph. Further examination showed several other 

 instances of a similar growth on this tree, but none so large or 

 perfect as this one, which was about 2 ft. high by 1 thick. The 

 tree is a very fine one, about 30 ft. in height, and the trunk at the 

 base about 15 inches in diameter. 



