296 BOTANICAL GAZETTE [APRIL 
7. After the lodgepole forest is once established and the fires are 
checked, it will slowly be replaced by the species that exist in the 
normal forests. 
8. The lodgepole pine is not successful in the bull pine belt. 
I wish to thank Dr. H. C. Cowrrs for many valuable suggestions 
made in the preparation of this paper; also Professor M. T. ELRop, 
through whose kindness I was permitted to make the Montana 
Biological Station headquarters while collecting data; also Professor 
Exrop, W. E. Prarcer, and W. B. McCativm for the photographs 
from which the illustrations were made. The taxonomic nomen- 
clature used in this paper is that found in RypBERG’s Catalogue oj 
the flora of Montana and the Yellowstone National Park, and Svv- 
WORTH’S Check list oj the jorest trees of the United States. 
LABORATORIES, 
Manila, i. 
