Excerpt from Reports of the United States Geological Survey of the Territories, Vol. 6 Sir: I have the honor to transmit for publication the very valuable report of Prof. Leo Lesquereux on the Fossil Flora of the Cretaceous Dakota Group. This division, lying at the base of the Cretaceous series, forms a most important link in the physical history of the western portion of the continent, containing as it does the first proofs of the introduction on the earth of a vegetation allied to our fruit and forest trees. The formation also has a vast geographical extension, being exposed along the flanks of the various mountain-ranges, from a point far north of our northern boundary, and extending far south to Mexico. Nearly all the fossil forms, however, vegetable or animal, that it has yielded up to this time, have been found on the plains in the eastern portions of Kansas and Nebraska. 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.