CONTENTS. 



No. 1. 

 REPORT UPON THE BOTANY OP THE ROUTE 



BYJ. S. NEWBERRY.M. D., 



GEOLOGIST AND BOTANIST OF THE EXPEDITION. 



CHAPTEE I. 



Geographical botany. 



-Influences affecting the botanical character of the region between San Francisco and the Columbia. Laws controlling the 

 distribution of species at present not understood. Novelty of the botanical character of this region. Variety of annual 

 plants. Small number of trees. Preponderance of coniferte. Climate. Geological structure. Local botany. Coast 

 mountains. Climate. Causes affecting it. Vegetation. Forests. Shrubs. Ferns and mosses. Sacramento valley. Cli 

 mate, character of seasons. Vegetation, its annual character. Timber belts. Local botany. Wild oat. Oak groves. 

 Shrubs. Tale*. Character of soil. Timber belts and thickets along the river banks. Botany of Sierra Nevada. Its unity 

 of character. Forests. Local botany. Zones of vegetation. Annual plants. Botany of the district east of the Sierra 

 Nevada and the Cascades. Uniformity of vegetation. Sage plains. Yellow pine forests. Local botany. Bunch grass. 

 Annual plants. Botany of shores of Klamath lake. Botany of the Des Chutes basin. Botany of the Cascade mountains. 

 Belts of vegetation. Forests of Willamette valley. 



CHAPTER II. 



Description of the forest trees of northern California and Oregon. 



No. 2. 



GENERAL CATALOGUE OF THE PLANTS COLLECTED ON THE 



EXPEDITION. 



I. EXOGENOUS PLANTS, BY ASA GRAY, JOHN TORRE Y, AND J. S. NEWBERRY. 

 II. ENDOGENOUS PLANTS, BY JOHN TORREY. 



III. MOSSES AND LIVERWORTS, BY W. S. SULLIVANT. 



IV. LICHENS, BY EDWARD TUCKERMAN. 



