igi 2 ] BROWN PINUS RIGID A 403 



FIG. 9. Same, but cutting taken about 5 m. from the apex; cambium in 

 the resting condition; X5o. 



FIG. 10. Cutting from main axis of tree VI April 22, 1910, at a distance 

 of 3 m. from the apex; growth in evidence to the extent of several rows of 

 partially formed tracheids; X5o. 



FIG. ii. Same, but cutting from the base of a lateral branch which 

 entered the main axis 20 cm. below cutting shown in fig. 10; no growth in 

 evidence; X5o. 



FIG. 12. -Same, but cutting taken 40 cm. below that in fig. 10; growth 

 in evidence to the extent of several rows of tracheids; X5o. 



