Excerpt from The Spruce and Balsam Fir Trees of the Rocky Mountain Region The class and family relationship of the spruces and balsam firs to other cone-bearing trees of the Rocky Mountain region is fully explained in the above-mentioned publication, to which the reader is referred for this general information. Keys are provided on pp. 42 and 43 for the identification of genera and species. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.