﻿BOTANICAL GAZETTE 



Chimaphila umbellata 



A similar list of species found in an early phase of the reforesta- 

 tion of a burn will show the changes incident to fire : 



Trees Pachystima Myrsinites Cornus canadensis 



Leading species Rubus strigosus Apocynum androsaemi- 



Tsuga heterophylla (2) ^ lnus * enuifolla x, J2"L 



Popului 



P^udol 



Clintoi 

 Pedicularis contort 



-Ih,!i : 



Picea Engelmannii is the most generally distributed species of 

 the region. It occurs throughout the area, in the neighboring 

 Rockies, and in the Gold Range, and extends upward into the 

 subalpine. Its relative importance is greater in the southeast and 

 in the Rockies, where it does not come into competition with the 

 hemlock. In the southeast it is usually the most abundant species 

 of the climax forest, although, like other trees in that quarter, 

 mostly of 30-50 cm. diameter and a height of 15-25 m. 



Tsuga heterophylla, on the other hand, is sharply limited in its 

 distribution. It does not occur at all to my knowledge south or 

 east of the Beaver and Columbia, being therefore quite absent from 

 the Rockies. Within the bend, however, it at once becomes 

 abundant and, growing luxuriantly as it does, may well be said to 



