46 Part I. Chapter 2. 
important books which have been instrumental in the writing of this book. 
As this book is merely an introduction to the phytögeography of North America, 
many titles have been omitted purposely from the bibliography, because they 
will come naturally into prominence in the preparation of special volumes on 
North American flora, which are designed to follow the publication of this 
volume. 
A. General works on North American botany and plant- 
geography. 
ADAMS, CHARLES C.: Post glacial Origin and Migrations of the Life of the northeastern United 
States. Journal of Geography I: 303. September 1902. 
Acassız, Louis and CABoT, J. ELLiorrt: Lake Superior: its physical Character, Vegetation, and 
Animals. Boston 1850. 
BARNES, CHARLES REID and HEALD, FRED DE Forzst: Analytic Keys to the Genera and Species 
of.North American Mosses. Bulletin University Wisconsin Science, series I No. 5: 157— 
368, revised and extended edition. 
BARToN, W.P.C.: A Flora of North America, three volumes Philadelphia 1821—23. 
BEAL, W.J.: Geographical Distribution of the Grasses > North erneie Proceedings American 
ec ae Advancement Science XXXIX: 
40. 
BIGELow, JAcog: The iR ngege Forwardness of the Spring in different Parts of the United 
States, Cambridge 1818. 
BOARD OF GEOGRAPHIC Nail First Report 1890-91. Washington 1892; Second Report 1890 
—99. Washington 1900. Documents House of Representatives. 
BrANDISs, D.: Der Wald in den en Staaten von Nordamerika. Verh. nafsirhiat, Ver. 
preuß. Rheinl. Bonn. XLVII: 265—306, (1891.) Cfr. Geograph. Jahrbuch XV. 385, Gotha 1892. 
BrAY, WILLIAML.: The Relations of the North American Flora to that of South America. Science, 
new ser. XII: 709. November 9th, 1900, P 
ern it Historical Sketch of the —_ of B 
1840. American Naturalist XIII: 754; 
25. 
— Di a Nordamerikas. Just’s Bolknliehet Jahresbericht 1874, Zweiter Jahrgang, 
. Abth.: 
otany in North America from 1635 
BRITTON, N. L. and SHAFER, J. A.: North American Tree es, being Descriptions and Illustrations 
of the Trees growing independently of Cultivation in North America, North of Mexico 
and the West Indies, pages X—894. New Yor 1908. 
BRUNCKEN, ERNEST: North American Forests and er 
of the American People. New York and London 
CLEMENTS, F.E.: The zonal Constitution and Dspositörk of: the plant Formations. Report 67th 
7 Meeting British Association Advancement Science Toronto 1897: 863. ; 
e: -—— Research Methods in Ecology. Lincoln, Neb, 1905, pages 334. 
—— A System of Nomenclature for Phytogeography, Engler’s Botanische Jahrbücher. XXXI. 
Heft 4/5. 1902. 
—— The Development and Structure of Vegetation. Studies in the Vegetation of the State II: 
5—175 University of Nebraska. Botanical Survey of Nebraska. April ıst, 1904. 
—— Formation and succession Herbaria (Nebraska) University Studies No. 4, Oct. 1904. 
Plant Physiology and Ecology, New York 1907. 
their Relation to the national Life 
