157 



FIG. I. Photograph, showing abnormal development of short growth into long 

 growth in Pinus excels a Wall. About % nat. size. 



the latter to better advantage. It is quite evident that the shoot 

 has developed from the growing point of the short growth, 

 which, as above stated, normally atrophies and dies. The 

 cause of this abnormal development is probably to be looked for 

 in the dying out, due to injury of some sort, of the growing 

 point of the long growth. All that remains of this may be seen 

 in the figure as a small prominence to the left of the base of the 

 original leaf fascicle. 



It was asserted above that this phenomenon is a rare occur- 

 rence, a statement which should perhaps be qualified by adding 

 that it is rare in trees older than the seedling stage. For the 

 writer has seen not only buds develop at the terminus of the short 



