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1905] WHITFORD—FORESTS OF FLATHEAD VALLEY 287 
Many instances were noted, especially in the region outside the plot 
mapped, in which lodgepole pine was thus being driven out of forests 
where doubtless it was more prominent in the young stages of devel- 
opment. 
Referring again to the original case, it will be seen to be highly 
improbable that the species in the stand around the hypothetical burn 
Pic. 21.—Young growth of lodgepole pine and Engelmann spruce in a clearing 
of the same species.—Photograph by PRAEGER. 
Would produce seeds equally well. Some species might not have 
any seeds at all, and they would form no part in the new forest unless 
a few seeds are blown into the area from regions where there are 
Seed-bearing trees. The lowland fir during the past two years has 
Produced few if any seeds in Swan River valley. Any burn made 
in the valley then within two years could not be stocked with seeds 
of this Species. If for oe Douglas spruce or western larch 
Produce seeds more abundantly than any of the other trees, they are 
likely, other things being equal, to have more representatives in the 
