CONTENTS 
No. ]. 
REPORT UPON THE BOTANY OF THE ROUTE. 
BY J. S. NEWBERRY, M. D., 
GEOLOGIST AND BOTANIST OF THE EXPEDITION. 
CHAPTER I. 
Geographical botany. 
Influences affecting the botanical character of the region between San E'rancisco 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 conifer®.—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.—Tuld.—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.— 
Belt's 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 TORREY, AND J. S. NEWBERRY. 
II. ENDOGENOUS PLANTS, BY JOHN TORREY. 
III. MOSSES AND LIVERWORTS, BY W. S. SULLIVANT. 
IV. LICHENS, BY EDWARD TUCKERMAN. 
